Mari and Yori investigate the switched bodies and observe Isao at his apartment. Yori has discovered a secret. They end up taking the bull by the horn and make their way inside his room and get sidetracked cleaning and playing video games. Mari's parents are worried and attempt to speak with her. Unhappy with the situation Mari's (Isao's) feelings boil over and she dives into a sexual fantasy involving Isao and Mari when a surprise calls comes in.

'Mari' takes sides between Yori and Momoka and the other girls. She reveals that the real Mari had called her on the phone yesterday. Mari visits Isao and surprises him. He is happy to see her and excuses himself to the washroom. Mari finds no shame in what he is doing and asks him to do it in front of her while looking at her.

Mari is unresponsive and catatonic. Yori forces her way into Mari's house and room to see her and is successful compelling Mari's mother to confess to what had transpired. Isao has a job hoping that the new initiative and effort shall lead to Mari looking at him favourably. A conversation with Yori does not end well.