Những bài hát của ca sỹ "Ken Hirai"
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WE'RE ALL ALONE
Ken Hirai
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Love or Lust (Less Vocal)
Ken Hirai
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Soredemoshitai
Ken Hirai
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Blanket
Ken Hirai
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K. O. L.
Ken Hirai
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Miss Summertime
Ken Hirai
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Virtual Insanity
Ken Hirai
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Timing
Ken Hirai
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Sekaide Ichiban Kimiga Suki?
Ken Hirai
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Open
Ken Hirai
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KILLING ME SOFTLY WITH HIS SONG
Ken Hirai
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Kazokuninarouyo
Ken Hirai
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Kimiga Bokuni Hyouishita!!
Ken Hirai
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Okina Furudokei
Ken Hirai
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Boku Ha Kimi Ni Koi Wo Suru
Ken Hirai
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Sing Forever
Ken Hirai
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Itoshiki Hibiyo
Ken Hirai
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Kagiana
Ken Hirai
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Soredeiina
Ken Hirai
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Hitomiwo Tojite
Ken Hirai