Uozumi Rikuo runs into his old crush, Morinome Shinako, and Nonaka Haru runs into her old crush, Rikuo.

Rikuo's old flame from school finds him and soon becomes his uninvited roommate. Later, Shinako and Haru meet her and misunderstand the situation.

Rikuo notices that something isn’t quite right between him and Shinako. Meanwhile, Haru suffers.