diff --git a/optuna_dashboard/ts/components/GraphParallelCoordinate.tsx b/optuna_dashboard/ts/components/GraphParallelCoordinate.tsx
index 0f26025d..d6cdcdc9 100644
--- a/optuna_dashboard/ts/components/GraphParallelCoordinate.tsx
+++ b/optuna_dashboard/ts/components/GraphParallelCoordinate.tsx
@@ -1,104 +1,24 @@
-import {
-  Checkbox,
-  FormControlLabel,
-  FormGroup,
-  Grid,
-  Typography,
-  useTheme,
-} from "@mui/material"
 import {
   GraphContainer,
+  PlotParallelCoordinate,
   useGraphComponentState,
-  useMergedUnionSearchSpace,
 } from "@optuna/react"
-import {
-  Target,
-  useFilteredTrials,
-  useObjectiveAndUserAttrTargets,
-  useParamTargets,
-} from "@optuna/react"
-import * as Optuna from "@optuna/types"
 import * as plotly from "plotly.js-dist-min"
-import React, { FC, ReactNode, useEffect, useState } from "react"
-import { SearchSpaceItem, StudyDetail } from "ts/types/optuna"
+import React, { FC, useEffect } from "react"
+import { StudyDetail } from "ts/types/optuna"
 import { PlotType } from "../apiClient"
 import { usePlot } from "../hooks/usePlot"
-import { usePlotlyColorTheme } from "../state"
 import { useBackendRender } from "../state"
 
 const plotDomId = "graph-parallel-coordinate"
 
-const useTargets = (
-  study: StudyDetail | null
-): [Target[], SearchSpaceItem[], () => ReactNode] => {
-  const [targets1] = useObjectiveAndUserAttrTargets(study)
-  const searchSpace = useMergedUnionSearchSpace(study?.union_search_space)
-  const [targets2] = useParamTargets(searchSpace)
-  const [checked, setChecked] = useState<boolean[]>([true])
-
-  const allTargets = [...targets1, ...targets2]
-  useEffect(() => {
-    if (allTargets.length !== checked.length) {
-      setChecked(
-        allTargets.map((t) => {
-          if (t.kind === "user_attr") {
-            return false
-          }
-          if (t.kind !== "params" || study === null) {
-            return true
-          }
-          // By default, params that is not included in intersection search space should be disabled,
-          // otherwise all trials are filtered.
-          return (
-            study.intersection_search_space.find((s) => s.name === t.key) !==
-            undefined
-          )
-        })
-      )
-    }
-  }, [allTargets])
-
-  const handleOnChange = (event: React.ChangeEvent<HTMLInputElement>) => {
-    setChecked(
-      checked.map((c, i) =>
-        i.toString() === event.target.name ? event.target.checked : c
-      )
-    )
-  }
-
-  const renderCheckBoxes = (): ReactNode => (
-    <FormGroup>
-      {allTargets.map((t, i) => {
-        return (
-          <FormControlLabel
-            key={i}
-            control={
-              <Checkbox
-                checked={checked.length > i ? checked[i] : true}
-                onChange={handleOnChange}
-                name={i.toString()}
-              />
-            }
-            label={t.toLabel(study?.objective_names)}
-          />
-        )
-      })}
-    </FormGroup>
-  )
-
-  const targets = allTargets.filter((t, i) =>
-    checked.length > i ? checked[i] : true
-  )
-  return [targets, searchSpace, renderCheckBoxes]
-}
-
 export const GraphParallelCoordinate: FC<{
   study: StudyDetail | null
 }> = ({ study = null }) => {
   if (useBackendRender()) {
     return <GraphParallelCoordinateBackend study={study} />
   } else {
-    return <GraphParallelCoordinateFrontend study={study} />
+    return <PlotParallelCoordinate study={study} />
   }
 }
 
@@ -135,198 +55,3 @@ const GraphParallelCoordinateBackend: FC<{
     />
   )
 }
-
-const GraphParallelCoordinateFrontend: FC<{
-  study: StudyDetail | null
-}> = ({ study = null }) => {
-  const { graphComponentState, notifyGraphDidRender } = useGraphComponentState()
-
-  const theme = useTheme()
-  const colorTheme = usePlotlyColorTheme(theme.palette.mode)
-
-  const [targets, searchSpace, renderCheckBoxes] = useTargets(study)
-
-  const trials = useFilteredTrials(study, targets, false)
-  useEffect(() => {
-    if (study !== null && graphComponentState !== "componentWillMount") {
-      plotCoordinate(study, trials, targets, searchSpace, colorTheme)?.then(
-        notifyGraphDidRender
-      )
-    }
-  }, [study, trials, targets, searchSpace, colorTheme, graphComponentState])
-
-  return (
-    <Grid container direction="row">
-      <Grid
-        item
-        xs={3}
-        container
-        direction="column"
-        sx={{
-          paddingRight: theme.spacing(2),
-          display: "flex",
-          flexDirection: "column",
-        }}
-      >
-        <Typography
-          variant="h6"
-          sx={{ margin: "1em 0", fontWeight: theme.typography.fontWeightBold }}
-        >
-          Parallel Coordinate
-        </Typography>
-        {renderCheckBoxes()}
-      </Grid>
-      <Grid item xs={9}>
-        <GraphContainer
-          plotDomId={plotDomId}
-          graphComponentState={graphComponentState}
-        />
-      </Grid>
-    </Grid>
-  )
-}
-
-const plotCoordinate = (
-  study: StudyDetail,
-  trials: Optuna.Trial[],
-  targets: Target[],
-  searchSpace: SearchSpaceItem[],
-  colorTheme: Partial<Plotly.Template>
-) => {
-  if (document.getElementById(plotDomId) === null) {
-    return
-  }
-
-  const layout: Partial<plotly.Layout> = {
-    margin: {
-      l: 70,
-      t: 50,
-      r: 50,
-      b: 100,
-    },
-    template: colorTheme,
-    uirevision: "true",
-  }
-  if (trials.length === 0 || targets.length === 0) {
-    return plotly.react(plotDomId, [], layout)
-  }
-
-  const maxLabelLength = 40
-  const breakLength = maxLabelLength / 2
-  const ellipsis = "…"
-  const truncateLabelIfTooLong = (originalLabel: string): string => {
-    return originalLabel.length > maxLabelLength
-      ? originalLabel.substring(0, maxLabelLength - ellipsis.length) + ellipsis
-      : originalLabel
-  }
-  const breakLabelIfTooLong = (originalLabel: string): string => {
-    const truncated = truncateLabelIfTooLong(originalLabel)
-    return truncated
-      .split("")
-      .map((c, i) => {
-        return (i + 1) % breakLength === 0 ? c + "<br>" : c
-      })
-      .join("")
-  }
-
-  const calculateLogScale = (values: number[]) => {
-    const logValues = values.map((v) => {
-      return Math.log10(v)
-    })
-    const minValue = Math.min(...logValues)
-    const maxValue = Math.max(...logValues)
-    const range = [Math.floor(minValue), Math.ceil(maxValue)]
-    const tickvals = Array.from(
-      { length: Math.ceil(maxValue) - Math.floor(minValue) + 1 },
-      (_, i) => i + Math.floor(minValue)
-    )
-    const ticktext = tickvals.map((x) => `${Math.pow(10, x).toPrecision(3)}`)
-    return { logValues, range, tickvals, ticktext }
-  }
-
-  const dimensions = targets.map((target) => {
-    if (target.kind === "objective" || target.kind === "user_attr") {
-      const values: number[] = trials.map(
-        (t) => target.getTargetValue(t) as number
-      )
-      return {
-        label: target.toLabel(study.objective_names),
-        values: values,
-        range: [Math.min(...values), Math.max(...values)],
-      }
-    } else {
-      const s = searchSpace.find(
-        (s) => s.name === target.key
-      ) as SearchSpaceItem // Must be already filtered.
-
-      const values: number[] = trials.map(
-        (t) => target.getTargetValue(t) as number
-      )
-      if (s.distribution.type === "CategoricalDistribution") {
-        // categorical
-        const vocabArr: string[] = s.distribution.choices.map(
-          (c) => c?.toString() ?? "null"
-        )
-        const tickvals: number[] = vocabArr.map((v, i) => i)
-        return {
-          label: breakLabelIfTooLong(s.name),
-          values: values,
-          range: [0, s.distribution.choices.length - 1],
-          // @ts-ignore
-          tickvals: tickvals,
-          ticktext: vocabArr,
-        }
-      } else if (s.distribution.log) {
-        // numerical and log
-        const { logValues, range, tickvals, ticktext } =
-          calculateLogScale(values)
-        return {
-          label: breakLabelIfTooLong(s.name),
-          values: logValues,
-          range,
-          tickvals,
-          ticktext,
-        }
-      } else {
-        // numerical and linear
-        return {
-          label: breakLabelIfTooLong(s.name),
-          values: values,
-          range: [s.distribution.low, s.distribution.high],
-        }
-      }
-    }
-  })
-  if (dimensions.length === 0) {
-    console.log("Must not reach here.")
-    return plotly.react(plotDomId, [], layout)
-  }
-  let reversescale = false
-  if (
-    targets[0].kind === "objective" &&
-    (targets[0].getObjectiveId() as number) < study.directions.length &&
-    study.directions[targets[0].getObjectiveId() as number] === "maximize"
-  ) {
-    reversescale = true
-  }
-  const plotData: Partial<plotly.PlotData>[] = [
-    {
-      type: "parcoords",
-      dimensions: dimensions,
-      labelangle: 30,
-      labelside: "bottom",
-      line: {
-        color: dimensions[0]["values"],
-        // @ts-ignore
-        colorscale: "Blues",
-        colorbar: {
-          title: targets[0].toLabel(study.objective_names),
-        },
-        showscale: true,
-        reversescale: reversescale,
-      },
-    },
-  ]
-
-  return plotly.react(plotDomId, plotData, layout)
-}
diff --git a/tslib/react/src/components/PlotParallelCoordinate.stories.tsx b/tslib/react/src/components/PlotParallelCoordinate.stories.tsx
new file mode 100644
index 00000000..42443339
--- /dev/null
+++ b/tslib/react/src/components/PlotParallelCoordinate.stories.tsx
@@ -0,0 +1,53 @@
+import { CssBaseline, ThemeProvider } from "@mui/material"
+import { Meta, StoryObj } from "@storybook/react"
+import React from "react"
+import { useMockStudy } from "../MockStudies"
+import { darkTheme } from "../styles/darkTheme"
+import { lightTheme } from "../styles/lightTheme"
+import { PlotParallelCoordinate } from "./PlotParallelCoordinate"
+
+const meta: Meta<typeof PlotParallelCoordinate> = {
+  component: PlotParallelCoordinate,
+  title: "Plot/ParallelCoordinate",
+  tags: ["autodocs"],
+  decorators: [
+    (Story, storyContext) => {
+      const { study } = useMockStudy(storyContext.parameters?.studyId)
+      if (!study) return <p>loading...</p>
+      return (
+        <ThemeProvider theme={storyContext.parameters?.theme}>
+          <CssBaseline />
+          <Story
+            args={{
+              study,
+            }}
+          />
+        </ThemeProvider>
+      )
+    },
+  ],
+}
+
+export default meta
+type Story = StoryObj<typeof PlotParallelCoordinate>
+
+export const LightTheme: Story = {
+  parameters: {
+    studyId: 1,
+    theme: lightTheme,
+  },
+}
+
+export const DarkTheme: Story = {
+  parameters: {
+    studyId: 1,
+    theme: darkTheme,
+  },
+}
+
+// TODO(c-bata): Add a story for multi objective study.
+// export const MultiObjective: Story = {
+//   parameters: {
+//     ...
+//   },
+// }
diff --git a/tslib/react/src/components/PlotParallelCoordinate.tsx b/tslib/react/src/components/PlotParallelCoordinate.tsx
new file mode 100644
index 00000000..f2a14dc6
--- /dev/null
+++ b/tslib/react/src/components/PlotParallelCoordinate.tsx
@@ -0,0 +1,291 @@
+import {
+  Checkbox,
+  FormControlLabel,
+  FormGroup,
+  Grid,
+  Typography,
+  useTheme,
+} from "@mui/material"
+import * as Optuna from "@optuna/types"
+import * as plotly from "plotly.js-dist-min"
+import React, { FC, ReactNode, useEffect, useState } from "react"
+import {
+  GraphContainer,
+  Target,
+  useFilteredTrials,
+  useGraphComponentState,
+  useMergedUnionSearchSpace,
+  useObjectiveAndUserAttrTargets,
+  useParamTargets,
+} from ".."
+import { plotlyDarkTemplate } from "./PlotlyDarkMode"
+
+const plotDomId = "plot-parallel-coordinate"
+
+export const PlotParallelCoordinate: FC<{
+  study: Optuna.Study | null
+  colorTheme?: Partial<Plotly.Template>
+}> = ({ study = null, colorTheme }) => {
+  const { graphComponentState, notifyGraphDidRender } = useGraphComponentState()
+
+  const theme = useTheme()
+  const colorThemeUsed =
+    colorTheme ?? (theme.palette.mode === "dark" ? plotlyDarkTemplate : {})
+
+  const [targets, searchSpace, renderCheckBoxes] = useTargets(study)
+
+  const trials = useFilteredTrials(study, targets, false)
+  useEffect(() => {
+    if (study !== null && graphComponentState !== "componentWillMount") {
+      plotCoordinate(study, trials, targets, searchSpace, colorThemeUsed)?.then(
+        notifyGraphDidRender
+      )
+    }
+  }, [
+    study,
+    trials,
+    targets,
+    searchSpace,
+    colorThemeUsed,
+    graphComponentState,
+    notifyGraphDidRender,
+  ])
+
+  return (
+    <Grid container direction="row">
+      <Grid
+        item
+        xs={3}
+        container
+        direction="column"
+        sx={{
+          paddingRight: theme.spacing(2),
+          display: "flex",
+          flexDirection: "column",
+        }}
+      >
+        <Typography
+          variant="h6"
+          sx={{ margin: "1em 0", fontWeight: theme.typography.fontWeightBold }}
+        >
+          Parallel Coordinate
+        </Typography>
+        {renderCheckBoxes()}
+      </Grid>
+      <Grid item xs={9}>
+        <GraphContainer
+          plotDomId={plotDomId}
+          graphComponentState={graphComponentState}
+        />
+      </Grid>
+    </Grid>
+  )
+}
+
+const plotCoordinate = (
+  study: Optuna.Study,
+  trials: Optuna.Trial[],
+  targets: Target[],
+  searchSpace: Optuna.SearchSpaceItem[],
+  colorTheme: Partial<Plotly.Template>
+) => {
+  if (document.getElementById(plotDomId) === null) {
+    return
+  }
+
+  const layout: Partial<plotly.Layout> = {
+    margin: {
+      l: 70,
+      t: 50,
+      r: 50,
+      b: 100,
+    },
+    template: colorTheme,
+    uirevision: "true",
+  }
+  if (trials.length === 0 || targets.length === 0) {
+    return plotly.react(plotDomId, [], layout)
+  }
+
+  const maxLabelLength = 40
+  const breakLength = maxLabelLength / 2
+  const ellipsis = "…"
+  const truncateLabelIfTooLong = (originalLabel: string): string => {
+    return originalLabel.length > maxLabelLength
+      ? originalLabel.substring(0, maxLabelLength - ellipsis.length) + ellipsis
+      : originalLabel
+  }
+  const breakLabelIfTooLong = (originalLabel: string): string => {
+    const truncated = truncateLabelIfTooLong(originalLabel)
+    return truncated
+      .split("")
+      .map((c, i) => {
+        return (i + 1) % breakLength === 0 ? `${c}<br>` : c
+      })
+      .join("")
+  }
+
+  const calculateLogScale = (values: number[]) => {
+    const logValues = values.map((v) => {
+      return Math.log10(v)
+    })
+    const minValue = Math.min(...logValues)
+    const maxValue = Math.max(...logValues)
+    const range = [Math.floor(minValue), Math.ceil(maxValue)]
+    const tickvals = Array.from(
+      { length: Math.ceil(maxValue) - Math.floor(minValue) + 1 },
+      (_, i) => i + Math.floor(minValue)
+    )
+    const ticktext = tickvals.map((x) => `${(10 ** x).toPrecision(3)}`)
+    return { logValues, range, tickvals, ticktext }
+  }
+
+  const dimensions = targets.map((target) => {
+    if (target.kind === "objective" || target.kind === "user_attr") {
+      const values: number[] = trials.map(
+        (t) => target.getTargetValue(t) as number
+      )
+      return {
+        label: target.toLabel(study.metric_names),
+        values: values,
+        range: [Math.min(...values), Math.max(...values)],
+      }
+    }
+    const s = searchSpace.find(
+      (s) => s.name === target.key
+    ) as Optuna.SearchSpaceItem // Must be already filtered.
+
+    const values: number[] = trials.map(
+      (t) => target.getTargetValue(t) as number
+    )
+    if (s.distribution.type === "CategoricalDistribution") {
+      // categorical
+      const vocabArr: string[] = s.distribution.choices.map(
+        (c) => c?.toString() ?? "null"
+      )
+      const tickvals: number[] = vocabArr.map((_, i) => i)
+      return {
+        label: breakLabelIfTooLong(s.name),
+        values: values,
+        range: [0, s.distribution.choices.length - 1],
+        // @ts-ignore
+        tickvals: tickvals,
+        ticktext: vocabArr,
+      }
+    }
+    if (s.distribution.log) {
+      // numerical and log
+      const { logValues, range, tickvals, ticktext } = calculateLogScale(values)
+      return {
+        label: breakLabelIfTooLong(s.name),
+        values: logValues,
+        range,
+        tickvals,
+        ticktext,
+      }
+    }
+    // numerical and linear
+    return {
+      label: breakLabelIfTooLong(s.name),
+      values: values,
+      range: [s.distribution.low, s.distribution.high],
+    }
+  })
+  if (dimensions.length === 0) {
+    console.log("Must not reach here.")
+    return plotly.react(plotDomId, [], layout)
+  }
+  let reversescale = false
+  if (
+    targets[0].kind === "objective" &&
+    (targets[0].getObjectiveId() as number) < study.directions.length &&
+    study.directions[targets[0].getObjectiveId() as number] === "maximize"
+  ) {
+    reversescale = true
+  }
+  const plotData: Partial<plotly.PlotData>[] = [
+    {
+      type: "parcoords",
+      dimensions: dimensions,
+      labelangle: 30,
+      labelside: "bottom",
+      line: {
+        color: dimensions[0].values,
+        // @ts-ignore
+        colorscale: "Blues",
+        colorbar: {
+          title: targets[0].toLabel(study.metric_names),
+        },
+        showscale: true,
+        reversescale: reversescale,
+      },
+    },
+  ]
+
+  return plotly.react(plotDomId, plotData, layout)
+}
+
+const useTargets = (
+  study: Optuna.Study | null
+): [Target[], Optuna.SearchSpaceItem[], () => ReactNode] => {
+  const [targets1] = useObjectiveAndUserAttrTargets(study)
+  const searchSpace = useMergedUnionSearchSpace(study?.union_search_space)
+  const [targets2] = useParamTargets(searchSpace)
+  const [checked, setChecked] = useState<boolean[]>([true])
+
+  const allTargets = [...targets1, ...targets2]
+  useEffect(() => {
+    if (allTargets.length !== checked.length) {
+      setChecked(
+        allTargets.map((t) => {
+          if (t.kind === "user_attr") {
+            return false
+          }
+          if (t.kind !== "params" || study === null) {
+            return true
+          }
+          // By default, params that is not included in intersection search space should be disabled,
+          // otherwise all trials are filtered.
+          return (
+            study.intersection_search_space.find((s) => s.name === t.key) !==
+            undefined
+          )
+        })
+      )
+    }
+  }, [allTargets, study, checked.length])
+
+  const handleOnChange = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setChecked(
+      checked.map((c, i) =>
+        i.toString() === event.target.name ? event.target.checked : c
+      )
+    )
+  }
+
+  const renderCheckBoxes = (): ReactNode => (
+    <FormGroup>
+      {allTargets.map((t, i) => {
+        const key = t.toLabel(study?.metric_names)
+        return (
+          <FormControlLabel
+            key={key}
+            control={
+              <Checkbox
+                checked={checked.length > i ? checked[i] : true}
+                onChange={handleOnChange}
+                name={i.toString()}
+              />
+            }
+            label={t.toLabel(study?.metric_names)}
+          />
+        )
+      })}
+    </FormGroup>
+  )
+
+  const targets = allTargets.filter((_, i) =>
+    checked.length > i ? checked[i] : true
+  )
+  return [targets, searchSpace, renderCheckBoxes]
+}
diff --git a/tslib/react/src/index.ts b/tslib/react/src/index.ts
index 71518938..1e19d589 100644
--- a/tslib/react/src/index.ts
+++ b/tslib/react/src/index.ts
@@ -6,6 +6,7 @@ export { PlotHistory } from "./components/PlotHistory"
 export { PlotImportance } from "./components/PlotImportance"
 export { PlotIntermediateValues } from "./components/PlotIntermediateValues"
 export { PlotSlice } from "./components/PlotSlice"
+export { PlotParallelCoordinate } from "./components/PlotParallelCoordinate"
 export { TrialTable } from "./components/TrialTable"
 export { GraphContainer } from "./components/GraphContainer"
 export { useGraphComponentState } from "./hooks/useGraphComponentState"
diff --git a/tslib/react/test/PlotParallelCoordinate.test.tsx b/tslib/react/test/PlotParallelCoordinate.test.tsx
new file mode 100644
index 00000000..5f8d4275
--- /dev/null
+++ b/tslib/react/test/PlotParallelCoordinate.test.tsx
@@ -0,0 +1,34 @@
+import * as Optuna from "@optuna/types"
+import { render, screen } from "@testing-library/react"
+import React from "react"
+import { describe, expect, test } from "vitest"
+import { PlotParallelCoordinate } from "../src/components/PlotParallelCoordinate"
+
+describe("PlotParallelCoordinate Tests", async () => {
+  const setup = ({
+    study,
+    dataTestId,
+  }: { study: Optuna.Study; dataTestId: string }) => {
+    const Wrapper = ({
+      dataTestId,
+      children,
+    }: {
+      dataTestId: string
+      children: React.ReactNode
+    }) => <div data-testid={dataTestId}>{children}</div>
+    return render(
+      <Wrapper dataTestId={dataTestId}>
+        <PlotParallelCoordinate study={study} />
+      </Wrapper>
+    )
+  }
+
+  for (const study of window.mockStudies) {
+    test(`PlotParallelCoordinate (study name: ${study.name})`, () => {
+      setup({ study, dataTestId: `plot-parallel-coordinate-${study.id}` })
+      expect(
+        screen.getByTestId(`plot-parallel-coordinate-${study.id}`)
+      ).toBeInTheDocument()
+    })
+  }
+})