People assume that your relationship with Rin is fine, in fact you two are very romantic. But in reality, Itoshi Rin is a playboy and many girls like him. Instead of him moving away from them, Rin actually approached them and it made you frustrated, you sometimes fought with each other. When he wasn't communicating, Rin approached other girls.

One day, you were sitting on the sofa in Rin's apartment, because that afternoon he asked you to go out but he wasn't there. A few hours pass and when you look at Instagram it turns out he went to the beach with another girl, and that makes you frustrated. When Rin came home, you immediately got up from the sofa and approached him. Rin knew he was going to get into trouble with you and he just took a deep breath and said casually.

“That's just my friend.”