Những bài hát của ca sỹ "Ken Hirai"
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Strawberry Sex (Ken's Bar 2017 X'mas Special Live!!)
Ken Hirai
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Itsuka Hanareru Higakitemo (Less Vocal)
Ken Hirai
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Kiss of Life (Less Vocal)
Ken Hirai
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Kusare Enn
Ken Hirai
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Mahoutte Itte Iikana? (VaVa Remix)
Ken Hirai
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Missin' You -It Will Break My Heart (Remix Ascended)
Ken Hirai
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Kimino Sukinakoto (Less Vocal)
Ken Hirai
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Brand New Bike
Ken Hirai
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World End
Ken Hirai
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Strawberry Sex (Less Vocal)
Ken Hirai
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Bye My Melody (HALFBY's music for momo REMIX)
Ken Hirai
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Elegy (Less Vocal)
Ken Hirai
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Bye My Melody (Less Vocal)
Ken Hirai
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Run To You
Ken Hirai
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Fake Star Ken's Swingin' Jazz
Ken Hirai
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It Will Break My Heart (-English Version-)
Ken Hirai
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Plus One (KSUKE Remix)
Ken Hirai
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Nonfiction (Less Vocal)
Ken Hirai
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Kimino Kodou Wa Kiminishika Narasenai (Drama Version)
Ken Hirai
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Missin' You -It Will Break My Heart (Instrumental)
Ken Hirai
