Episodes (4)
The Stepfather's Forbidden Lesson
Tsumugi is a rebellious teenager who openly despises her stepfather, Ryou, and dreams of ending his marriage to her mother. While her best friend Saki attempts to recruit her into the world of sugar dating, Ryou secretly obsesses over Tsumugi, eventually deciding to "discipline" her through forced intimacy to ensure her obedience. As their relationship shifts into a dark and illicit secret, Tsumugi finds herself trapped in a cycle of hatred and submission, culminating in a tense encounter where Saki discovers Ryou's true identity.
Forbidden Reunion
Tsumugi's strained relationship with her stepfather Ryou takes a shocking turn when her older sister, Uta, returns home. It is revealed that Ryou and Uta previously shared a secret sugar-dating relationship, and despite Uta's attempts to move on with a new boyfriend, Ryou manages to seduce her back into his bed. As the two rekindle their illicit affair, Tsumugi is left horrified by the truth about her father and sister.
Forbidden Discipline
Tsumugi continues her rebellious behavior toward her stepfather, Ryou, only to be subjected to his secret and degrading "punishments." While Tsumugi attempts to protect her mother by spying on Ryou's interactions with her best friend Saki—who is secretly trying to lure Ryou into a sugar dating relationship—she falls deeper into Ryou's web of psychological manipulation. As Ryou exerts control over the women in the house, Saki maneuvers her way closer to him, further complicating the dysfunctional family dynamic.
Forbidden Lessons
Tsumugi's attempt to expose her stepfather Ryou's sleazy past backfires when he subjects her to a harsh, sexual "discipline" that leaves her conflicted. As Tsumugi struggles with her feelings, her best friend Saki also falls under Ryou's influence, seeking to emulate Uta's former relationship with him. The episode culminates in a shocking confrontation when Tsumugi catches Ryou and Saki in an intimate moment.
