​In this episode based on the original work of Maruta, Miyu finds herself in a compromising situation when her breasts are groped by a train molester. Luckily, her classmate Shun appears and rescues her, but little does she know that it was all part of his cunning plan. Feeling regret over losing her first kiss, Miyu encounters her childhood friend Kou, who takes her to his home after she loses her key. Confessing what happened, Miyu is surprised to learn that she had already shared a kiss with Kou. That night, they take their relationship to the next level. However, the next day, Shun apologizes and invites Miyu to his home, unaware of the trap that awaits her. Shun drugs her and begins training her as his sex slave. As she struggles with conflicting emotions, Miyu starts to question her desires. What will happen to her relationship with Kou?​