Aika is in love with the handsome teacher Tonami, whom she admires, and Mizuki gently watches over her younger sister.
The sisters thought that their sweet and bitter youth would continue like this, but...?
When Aika confesses to Tonami that she will do anything for him and wants to go out with him, everything changes!
In exchange for going out with him, Aika is at Tonami's mercy, and one day she is surrounded by strange men who are Tonami's "friends".
The men who surround the frightened Aika make her immerse herself in hellish pleasure...?
憧れのイケメン教師戸波に惚れている愛華、そんな妹を優しく見守る瑞希。
こんな優しく甘酸っぱい青春が続くと思っていた姉妹だったが…？
愛華が戸波へ何でもするから付き合って欲しいと告白した時から、全てが一変する！
付き合う代わりに戸波の言いなりになった愛華は、ある日戸波の【友人】という見知らぬ男達に囲まれてしまう。
怯える愛華を囲んだ男達によって、彼女は地獄の快楽漬けにされ…？
