Tomodachi Kekkon

Seri and Machiru have been living together for seven years ever since they were college students. The two of them discover that their lease renewal is in just two months. Seri, who is quick to fall out of love and in a cycle of finding a new romance and then breaking up one after the other, was happy with her lifestyle with Machiru with whom she was not in a romantic relationship. One day, Machiru is suddenly approached by her boyfriend with a suggestion for her to live with him. At first she's confused by the sudden invitation, but thinking that it might be good to try to experience such a different living situation, she decides to cancel her cohabitation with Seri to live with her boyfriend, but...