Ken Hirai
僕がどんなに君を好きか、君は知らない
Ken Hirai & Amuro Namie
Grotesque
Ken Hirai
Kokuhaku (OST W no Higeki)
Ken Hirai
sonebody's girl
Ken Hirai
Hitomiwo Tojite
Ken Hirai
Hitomi wo Tojite
Hirai Ken
Aozora Sanka ~青空傘下~
Ken Hirai
Unchained Melody
Ken Hirai
Kimi wa Tomodachi (Soul Source Production Mix)
Ken Hirai
Itoshiki Hibiyo
Ken Hirai
Onnajisamishisa
Ken Hirai
Shiroi Koibitotachi
Ken Hirai
Woman Wnohigekiyori
Ken Hirai
Yatsuranoashiotonoballad