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Watch: INFINITE's L Sings Of His Unrequited Love For Kim So Hyun In “Ruler: Master Of The Mask” OST MV | Soompi
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Ruler - Master of the Mask, Pt. 17 (Original Television Soundtrack) - Single by Yu Sung Eun on Apple Music
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Ruler - Master of the Mask, Pt. 18 (Original Television Soundtrack) - Single by Heo Young Saeng on Apple Music
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