Synopsis
Manaka has a crush on the handsome teacher Tonami, whom she greatly admires, while her older sister Mizuki quietly looks after her. The two sisters assumed their sweet yet bittersweet youth would go on as always—until Manaka tells Tonami she'll do whatever it takes and wants to date him, and that declaration flips everything. In exchange for the relationship, Manaka is left at Tonami's mercy, and eventually she finds herself surrounded by peculiar men described as Tonami's "friends." These men terrify Manaka and force her to plunge into a hellish pleasure...
