diff --git a/src/routes/analysis/+page.svelte b/src/routes/analysis/+page.svelte
index e88841d..e085577 100644
--- a/src/routes/analysis/+page.svelte
+++ b/src/routes/analysis/+page.svelte
@@ -46,6 +46,7 @@
     fixedCooldownReductions?: (CooldownReduction | null)[];
     allBlueNodes?: boolean[];
     generationBonusOverrides?: (number | null)[];
+    songScoreBonusOverride?: number | null;
     leaderCharacterId: string;
     leaderOutfitCardId: string;
   };
@@ -96,6 +97,7 @@
   let fixedCooldownReductions: (CooldownReduction | null)[] = selectedCardIds.map(() => null);
   let allBlueNodes = selectedCardIds.map(() => false);
   let generationBonusOverrides: (number | null)[] = selectedCardIds.map(() => null);
+  let songScoreBonusOverride: number | null = null;
   let leaderCharacterId = leaderMembers[0]?.characterId ?? '';
   let leaderOutfitCardId = leaderMembers[0]?.id ?? '';
   let worker: Worker | null = null;
@@ -141,7 +143,10 @@
   $: boardEffects = calculateBoardEffects(boardSummary, effectiveMemberBoards, selectedSourceCards, leaderCharacterId, selectedChart, {
     placements: boardCards,
     cards: connectionCards
-  }, { generationBonusByCardId });
+  }, {
+    generationBonusByCardId,
+    ...(songScoreBonusOverride === null ? {} : { directSongScoreBonusPercent: songScoreBonusOverride })
+  });
   $: memoryPermil = memoryParameterPermil(memoryCount, memorySummary.effects);
   $: unitPower = (() => {
     try {
@@ -180,6 +185,7 @@
     fixedCooldownReductions,
     allBlueNodes,
     generationBonusOverrides,
+    songScoreBonusOverride,
     leaderCharacterId,
     leaderOutfitCardId
   } satisfies SavedAnalysisState;
@@ -192,6 +198,7 @@
     fixedCooldownReductions,
     allBlueNodes,
     generationBonusOverrides,
+    songScoreBonusOverride,
     leaderCharacterId,
     leaderOutfitCardId
   });
@@ -301,6 +308,7 @@
     if (!legacy && state.schemaVersion !== 2) return;
     if (typeof state.songId === 'string' && songs.some((song) => song.id === state.songId)) selectedSongId = state.songId;
     if (state.difficulty === 'hard' || state.difficulty === 'expert') difficulty = state.difficulty;
+    songScoreBonusOverride = normalizeSongScoreBonusOverride(state.songScoreBonusOverride);
 
     if (Array.isArray(state.cardIds) && state.cardIds.length === 5) {
       const restoredCards = state.cardIds.map((id) => cardById.get(id)).filter((card): card is CardRow => Boolean(card));
@@ -380,6 +388,19 @@
     result = null;
   }
 
+  function normalizeSongScoreBonusOverride(value: unknown): number | null {
+    if (typeof value !== 'number' || !Number.isFinite(value) || value < 0) return null;
+    return Math.min(10, value);
+  }
+
+  function updateSongScoreBonusOverride(input: HTMLInputElement): void {
+    const parsed = Number(input.value);
+    if (input.value.trim() === '' || !Number.isFinite(parsed) || parsed < 0) input.value = '';
+    if (parsed > 10) input.value = '10';
+    songScoreBonusOverride = input.value === '' ? null : Math.min(10, parsed);
+    result = null;
+  }
+
   function boardsForSelectedCards(
     storedBoards: MemberBoards,
     cardIds: readonly string[],
@@ -439,7 +460,10 @@
     const localBoardEffects = calculateBoardEffects(boardSummary, effectiveMemberBoards, selectedSourceCards, leaderCharacterId, chartSummary, {
       placements,
       cards: connectionCards
-    }, { generationBonusByCardId });
+    }, {
+      generationBonusByCardId,
+      ...(songScoreBonusOverride === null ? {} : { directSongScoreBonusPercent: songScoreBonusOverride })
+    });
     const localUnitPower = calculateUnitPower(selectedCardIds.map((id, index) => ({
       card: cardById.get(id)!, awakening: selectedAwakenings[index]
     })), leaderOutfit, localBoardEffects, memoryPermil, memberPowerUpPercent);
@@ -776,8 +800,11 @@
           <option value="hard">Hard</option>
         </select>
       </label>
+      <label>가창 보너스 덮어쓰기 (0~10%)
+        <input class="number-input" type="number" min="0" max="10" step="any" value={songScoreBonusOverride ?? ''} placeholder="실제 보드값" on:input={(event) => updateSongScoreBonusOverride(event.currentTarget)}>
+      </label>
       <div class="power-summary"><span>자동 계산 종합력</span><strong>{overallPower.toLocaleString('ko-KR')}</strong></div>
-      <div class="chart-meta"><span>길이 {selectedChart?.durationSeconds ?? 0}초</span><span>노트 {selectedChart?.totalNotes?.toLocaleString('ko-KR') ?? 0}개</span><span>1노트 {Math.ceil(perfectNoteScore).toLocaleString('ko-KR')}점 · {scoreCalibrationLabel}</span>{#if boardEffects.directSongScoreBonusPercent > 0}<span>가창 보너스 {boardEffects.directSongScoreBonusPercent}%</span>{/if}</div>
+      <div class="chart-meta"><span>길이 {selectedChart?.durationSeconds ?? 0}초</span><span>노트 {selectedChart?.totalNotes?.toLocaleString('ko-KR') ?? 0}개</span><span>1노트 {Math.ceil(perfectNoteScore).toLocaleString('ko-KR')}점 · {scoreCalibrationLabel}</span>{#if boardEffects.directSongScoreBonusPercent > 0 || songScoreBonusOverride !== null}<span>가창 보너스 {boardEffects.directSongScoreBonusPercent}%{songScoreBonusOverride === null ? '' : ' · 덮어쓰기'}</span>{/if}</div>
     </div>
 
     <div class="card-fields">
@@ -835,7 +862,7 @@
         </div>
       {/each}
     </div>
-    <p class="board-guide">‘파란 노드 전체’를 사용하지 않으면 사용자 데이터에 저장된 해당 멤버의 보드를 사용합니다. 기수 보너스는 빈칸이면 실제 보드 수치를 사용하고, 숫자를 입력하면 해당 값으로 대체합니다.</p>
+    <p class="board-guide">‘파란 노드 전체’를 사용하지 않으면 사용자 데이터에 저장된 해당 멤버의 보드를 사용합니다. 기수 보너스와 가창 보너스 덮어쓰기는 빈칸이면 실제 보드 수치를 사용하고, 숫자를 입력하면 해당 값으로 대체합니다.</p>
     <div class="leader-fields">
       <label>리더
         <select value={leaderCharacterId} on:change={(event) => updateLeader(event.currentTarget.value)}>
@@ -1010,9 +1037,9 @@
   h2 { margin: 0; font-size: 18px; }
   .section-title > strong { color: #aeb6c4; font-size: 14px; }
   label { display: grid; gap: 7px; color: #8f98a8; font-size: 14px; font-weight: 750; }
-  select { width: 100%; min-width: 0; height: 42px; padding: 0 12px; border: 1px solid #343c49; border-radius: 9px; color: #e8ebf1; background: #11151b; font: inherit; }
-  select:focus, .generation-input:focus { border-color: #d86f9c; outline: 3px solid rgb(216 111 156 / 14%); }
-  .song-fields { display: grid; grid-template-columns: minmax(0, 4fr) clamp(110px, 11vw, 170px) clamp(140px, 14vw, 220px); align-items: start; gap: 12px; margin-top: 22px; }
+  select, .number-input { width: 100%; min-width: 0; height: 42px; padding: 0 12px; border: 1px solid #343c49; border-radius: 9px; color: #e8ebf1; background: #11151b; font: inherit; }
+  select:focus, .number-input:focus, .generation-input:focus { border-color: #d86f9c; outline: 3px solid rgb(216 111 156 / 14%); }
+  .song-fields { display: grid; grid-template-columns: minmax(0, 4fr) clamp(110px, 11vw, 170px) clamp(190px, 17vw, 250px) clamp(140px, 14vw, 220px); align-items: start; gap: 12px; margin-top: 22px; }
   .song-picker-field { min-width: 0; }
   .power-summary { display: grid; gap: 4px; min-height: 42px; margin-top: 25px; padding: 7px 11px; border-radius: 9px; background: #22202a; }
   .power-summary span { color: #929cab; font-size: 12px; font-weight: 750; }
diff --git a/src/routes/combination/+page.svelte b/src/routes/combination/+page.svelte
index 6577bdb..c4cb949 100644
--- a/src/routes/combination/+page.svelte
+++ b/src/routes/combination/+page.svelte
@@ -63,6 +63,7 @@
     fixedAllBlueNodes?: boolean[];
     fixedMaxGenerationBonuses?: boolean[];
     fixedGenerationBonusOverrides?: (number | null)[];
+    songScoreBonusOverride?: number | null;
     ownedCardsOnly?: boolean;
     maximizeCompute?: boolean;
     leaderCharacterId: string;
@@ -77,6 +78,7 @@
     fixedCooldownReductions: (CooldownReduction | null)[];
     allBlueNodes: boolean[];
     generationBonusOverrides: (number | null)[];
+    songScoreBonusOverride?: number | null;
     leaderCharacterId: string;
     leaderOutfitCardId: string;
   };
@@ -115,6 +117,7 @@
   let fixedCooldownReductions: (CooldownReduction | null)[] = [null, null, null, null];
   let fixedAllBlueNodes = [false, false, false, false];
   let fixedGenerationBonusOverrides: (number | null)[] = [null, null, null, null];
+  let songScoreBonusOverride: number | null = 10;
   let ownedCardsOnly = false;
   let maximizeCompute = false;
   let leaderCharacterId = leaderMembers[0]?.characterId ?? '';
@@ -195,6 +198,7 @@
     fixedCooldownReductions,
     fixedAllBlueNodes,
     fixedGenerationBonusOverrides,
+    songScoreBonusOverride,
     ownedCardsOnly,
     maximizeCompute,
     leaderCharacterId,
@@ -211,6 +215,7 @@
     fixedCooldownReductions,
     fixedAllBlueNodes,
     fixedGenerationBonusOverrides,
+    songScoreBonusOverride,
     ownedCardsOnly,
     maximizeCompute,
     leaderCharacterId,
@@ -306,6 +311,11 @@
     return Math.max(0, Math.min(900, Number.isFinite(value) ? Math.round(Number(value)) : 0));
   }
 
+  function normalizeSongScoreBonusOverride(value: unknown): number | null {
+    if (typeof value !== 'number' || !Number.isFinite(value) || value < 0) return null;
+    return Math.min(10, value);
+  }
+
   function sanitizeGenerationBonusInput(input: HTMLInputElement, previousValue: number | null): string {
     if (input.value === '') {
       input.value = '';
@@ -348,6 +358,9 @@
       if (typeof savedValue === 'number' && Number.isFinite(savedValue)) return normalizeGenerationBonus(savedValue);
       return state.fixedMaxGenerationBonuses?.[index] === true ? 900 : null;
     });
+    songScoreBonusOverride = state.songScoreBonusOverride === null
+      ? null
+      : normalizeSongScoreBonusOverride(state.songScoreBonusOverride) ?? 10;
     ownedCardsOnly = state.ownedCardsOnly === true;
     if (ownedCardsOnly) toggleOwnedCardsOnly(true);
     maximizeCompute = state.maximizeCompute === true;
@@ -389,6 +402,7 @@
         const value = state.generationBonusOverrides?.[index];
         return typeof value === 'number' && Number.isFinite(value) ? normalizeGenerationBonus(value) : null;
       }),
+      songScoreBonusOverride: normalizeSongScoreBonusOverride(state.songScoreBonusOverride),
       leaderCharacterId: typeof state.leaderCharacterId === 'string' ? state.leaderCharacterId : '',
       leaderOutfitCardId: typeof state.leaderOutfitCardId === 'string' ? state.leaderOutfitCardId : ''
     };
@@ -444,6 +458,14 @@
     result = null;
   }
 
+  function updateSongScoreBonusOverride(input: HTMLInputElement): void {
+    const parsed = Number(input.value);
+    if (input.value.trim() === '' || !Number.isFinite(parsed) || parsed < 0) input.value = '';
+    if (parsed > 10) input.value = '10';
+    songScoreBonusOverride = input.value === '' ? null : Math.min(10, parsed);
+    result = null;
+  }
+
   function toggleOwnedCardsOnly(enabled: boolean): void {
     ownedCardsOnly = enabled;
     if (enabled) {
@@ -669,7 +691,7 @@
       cards: connectionCards
     }, {
       generationBonusByCardId,
-      directSongScoreBonusPercent: 10
+      ...(songScoreBonusOverride === null ? {} : { directSongScoreBonusPercent: songScoreBonusOverride })
     });
     const power = calculateUnitPower(
       cards.map((card) => ({ card, awakening: awakeningForCard(card) })),
@@ -732,7 +754,12 @@
       const boardEffects = calculateBoardEffects(boardSummary, baselineBoards, cards, state.leaderCharacterId, chartMetadata, {
         placements: boardCards,
         cards: connectionCards
-      }, { generationBonusByCardId });
+      }, {
+        generationBonusByCardId,
+        ...(state.songScoreBonusOverride === null || state.songScoreBonusOverride === undefined
+          ? {}
+          : { directSongScoreBonusPercent: state.songScoreBonusOverride })
+      });
       const power = calculateUnitPower(
         cards.map((card, index) => ({ card, awakening: state.awakenings[index] })),
         outfit,
@@ -1055,6 +1082,7 @@
         </div>
       </div>
       <label>자동 후보 기수 보너스 덮어쓰기 (0~900)<input class="number-input" type="text" inputmode="numeric" pattern="[0-9]*" maxlength="3" value={candidateGenerationBonus ?? ''} placeholder="미사용" on:input={(event) => updateCandidateGenerationBonus(sanitizeGenerationBonusInput(event.currentTarget, candidateGenerationBonus))}></label>
+      <label>가창 보너스 덮어쓰기 (0~10%)<input class="number-input" type="number" min="0" max="10" step="any" value={songScoreBonusOverride ?? ''} placeholder="실제 보드값" on:input={(event) => updateSongScoreBonusOverride(event.currentTarget)}></label>
     </div>
     <label class="owned-cards-option">
       <input type="checkbox" checked={ownedCardsOnly} disabled={running} on:change={(event) => toggleOwnedCardsOnly(event.currentTarget.checked)}>
@@ -1112,7 +1140,7 @@
       <span>리더 의상 효과</span>
       <p>{leaderOutfitDescription || '적용할 수 있는 5성 의상이 없습니다.'}</p>
     </div>
-    <p class="hint">기수 보너스 덮어쓰기는 빈칸이면 저장된 실제 보드를 사용하고, 숫자를 입력하면 해당 값으로 대체합니다. 자동 후보는 파란 노드 전체 활성화·기수 보너스 {candidateGenerationBonus === null ? '저장값' : candidateGenerationBonus}·악곡 보너스 10% 조건으로 비교합니다.</p>
+    <p class="hint">기수 보너스와 가창 보너스 덮어쓰기는 빈칸이면 저장된 실제 보드를 사용하고, 숫자를 입력하면 해당 값으로 대체합니다. 자동 후보는 파란 노드 전체 활성화·기수 보너스 {candidateGenerationBonus === null ? '저장값' : candidateGenerationBonus}·가창 보너스 {songScoreBonusOverride === null ? '실제 보드값' : `${songScoreBonusOverride}%`} 조건으로 비교합니다.</p>
     <PresetManager storageKey={PRESET_STORAGE_KEY} snapshot={presetSnapshot} disabled={running} on:apply={applyPreset} />
     {#if errorMessage}<p class="error" role="alert">{errorMessage}</p>{/if}
     <button class="search" type="button" disabled={running} on:click={search}>{running ? searchPhase === 'screening' ? `후보 선별 중 ${Math.round(screeningProgress * 100)}%` : searchPhase === 'probability' ? `달성 확률 계산 중 ${Math.round(progress.evaluatedCandidates / Math.max(1, progress.totalCandidates) * 100)}%` : `정밀 분석 중 ${Math.round(progress.evaluatedCandidates / Math.max(1, progress.totalCandidates) * 100)}%` : '최적 조합 탐색'}</button>
@@ -1211,7 +1239,7 @@
   .song-picker-field { min-width: 0; }
   .chart-meta { display: flex; grid-column: 1 / -1; flex-wrap: wrap; align-items: center; gap: 8px; min-height: 42px; }
   .chart-meta span { padding: 7px 9px; border-radius: 7px; color: #adb5c2; background: #202631; font-size: 13px; white-space: nowrap; }
-  .candidate-fields { display: grid; grid-template-columns: clamp(130px, 12vw, 180px) clamp(260px, 24vw, 380px); gap: 9px; margin-top: 18px; }
+  .candidate-fields { display: grid; grid-template-columns: clamp(130px, 12vw, 180px) repeat(2, clamp(230px, 21vw, 340px)); gap: 9px; margin-top: 18px; }
   .candidate-awakening { display: grid; gap: 7px; color: #8f98a8; font-size: 14px; font-weight: 750; }
   .candidate-guide { margin: 7px 0 0; color: #737d8d; font-size: 12px; line-height: 1.5; }
   .fixed-fields { display: grid; gap: 9px; margin-top: 16px; }