Chiaki is fed up with Masatsugu, known as Osho or "King", the owner of the club, "Butterfly Kiss." As Osho continues his relationship with other women and Chiaki's heart and body begin to wear thin. However, as soon as Chiaki tries to leave, Osh insist he will never let him go?! How will Osho make up for the pain he's caused Chiaki to endure for all these years...?

Serie Butterfly Kiss:

1. Bokura ga Binetsu ni Naru Riyuu (1 Vol.)
   1.1 Extra: Kiss 5.75 (28p)
   1.2 崎谷はるひ&冬乃郁也 Collaboration Special book A and B
   2.Binetsu no Kajitsu - Butterfly Sky (2 Vol.)
   2.1 Spin-Off: ひとでなしの恋～バタフライ・エフェクト～1 (20p)
   2.2 Spin-Off: ひとでなしの恋～バタフライ・エフェクト～2 (36p)
   2.3 Extra: Liar Garden (12p)
   3.Kuchibiru ni Chou no Hone - Butterfly Rouge (3 Vol.)
   3.1 Extra: 陽だまりの記憶 (32p)
   3.2 Extra: カリギュラの涙 (16p)
   4. Kubisuji ni Chou no Yume - Butterfly Effect -