Hirai Ken (平井堅) - Kimi wa Su・Te・Ki♥ ~君はス・テ・キ♥~ (Less Vocal)

Hirai Ken (平井堅) - Kimi wa Su・Te・Ki♥

Hirai Ken (平井堅) - Kimi Wa Tomodachi ~キミはともだち~ (Less Main Vocal)

Hirai Ken (平井堅) - Boku Wa Kimi Ni Koi Wo Suru ~僕は君に恋をする~ (Less Vocal)

Hirai Ken (平井堅) - Kimi wa Tomodachi ~キミはともだち~ -ENCORE-

Hirai Ken (平井堅) - Kimi wa Tomodachi ~キミはともだち~ (Live)

Hirai Ken (平井堅) - Aishiteru -Less Vocal-

Hirai Ken (平井堅) - Kimi No Suki Na Toko ~Less Vocal~

Hirai Ken (平井堅) - Kokuhaku -Less Vocal-

Hirai Ken (平井堅) - Elegy ~less vocal~

Hirai Ken (平井堅) - Ring (Less Vocal)

Hirai Ken (平井堅) - CANVAS (Less Vocal)

Hirai Ken (平井堅) - CANDY (Less Vocal)

Hirai Ken (平井堅) - Why? (Less Vocal)

Hirai Ken (平井堅) - Miracles -Less Vocal-

Hirai Ken (平井堅) - TIME -Less Vocal-

Hirai Ken (平井堅) - Kimi ga Yo ~君が代~

Hirai Ken (平井堅) - Boku Wa Kimi Ni Koi Wo Suru ~僕は君に恋をする~

Hirai Ken (平井堅) - POP STAR (Less Vocal)

Hirai Ken (平井堅) - Non Fiction (Less Vocal)

Hirai Ken (平井堅) - Strawberry Sex (Less Vocal)

Hirai Ken (平井堅) - ƒKimi wa Tomodachi ~鍵穴~

Hirai Ken (平井堅) - Kimi ga Warattara ~君が笑ったら~

Hirai Ken (平井堅) - Kimi No Kodo Wa Kimi Ni Shika Narasenai ~君の鼓動は君にしか鳴らせない~

Hirai Ken (平井堅) - Kimi no kodou wa kimi ni shika narasenai ~君の鼓動は君にしか鳴らせない~

Hirai Ken (平井堅) - Kimi Ga Wakaranai ~君がわからない~

Hirai Ken (平井堅) - Bye My Melody -Less Vocal-

Hirai Ken (平井堅) - LOVE OR LUST (Less Vocal)

Hirai Ken (平井堅) - Kiss

Hirai Ken (平井堅) - KISS OF LIFE (Less Vocals)

Hirai Ken (平井堅) - Kanashii No Wa Kimi Dake Ja Nai ~悲しいのは君だけじゃない~