Souta, who harbored a secret love for Yoshuke's beautiful and young stepmother Saki, realized he had forgotten his smartphone on the way back from visiting Yoshuke's house. Since the door was unlocked, he headed towards Yoshuke's room and witnessed an unbelievable sight: Saki and Yoshuke were having sex. The object of his affection, Saki, was in a romantic relationship with Yoshuke of all people… Anger surged within Souta towards the mother and son who had put him in this state, and he vowed to take revenge.
