At work, Kuze helps a young and captivating boy, Ichiro, who happens to be the ace of the host club "Butterfly Kiss"? For good reasons, Kuze has a bad impression of host clubs and wants nothing to do with him. However, as he gets to know Ichiro better, their love grows and his perspective begins to shift. Can these two polar opposites make their relationship work or was it doomed from the start? See how their innocent love evolves!

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)