Mitsuki, and Yuya are invited to a fitness pool center by Ayaka. Once there she runs into Yukina, also present are Shotaro and Moa. Mitsuki who is wearing a bathing suit refuses to go into the water out of embarrassment that her belt might be seen. While watching everyone have fun, Neko introduces herself to Mitsuki and tells her she accompanied them there as her father owns the place. She also tells that her father wanted more opinions from people and allowed them to stay for free if they complied. Mitsuki thinks of Yuya while watching him have fun and reacts after seeing how his friend Shotaro is with his sister Moa. Yuya accidently hits his head against Yukina's causing him to fall in. Upon seeing this Mitsuki jumps in to help him but it is not needed as he turns out to be okay. Mitsuki's leg cramps up however, and Yuya carries her out and away someplace to sit. Unknowingly to both of them Mitsuki's bathing suit had fallen off. Yuya puts her down and is shocked to discover her wearing the belt, to make things worse some people come along to walk by. Yuya apologizes to Misuki and then proceeds to kiss her hiding the belt from view and making the people walking by think they are a couple making out. Yuya then takes his swimsuit off causing Mitsuki to scream in embarrassment and the heart on the belt to fill up more. It is shown afterwards that Yuya gave her his swimsuit that he wore two pairs of swimwear for some reason. The next day, Yuya thinks of why Mitsuki could be wearing the belt, while unconsciously rubbing Mitsuki's panties on his face that had been given back to him. Mitsuki meanwhile who stayed home from school sick, hits her breaking point and is ready to cut off the belt with scissors when she collapses. Hiyori seeing that the belt on her is not looking good possesses Mitsuki. She then goes on top of Yuya when he comes to check to see if Mitsuki is allright after getting home from school. As Hiyori asks Yuya to do her she comes out of Mitsuki and reveals herself to him, in response he confusingly asks who she is.