Mi (Asuka Kawazu), who is now a college student, still has feelings for her boyfriend from junior high school. She entered college and wanted to start a new relationship. Unexpectedly, the person living in the next room is her ex-boyfriend Kaede (Jin Suzuki). Five years have passed, and although she has become mature, her gentle smile has not changed. Kaede seems to have some intentions towards Mi, whose delusions are expanding. At the same time, Kaede's friend Kazuha (Jinto Yoshida) is also attracted to Mi and keeps approaching her. Mi is caught between her grown-up ex-boyfriend and his friends, and begins an unusual college life. @哦撸马（阿点）