Rin and Narumi, who live in neighboring apartments, are close friends constantly bickering and at odds with each other. One night, after Narumi gets drunk and accidentally enters Rin's apartment, the two begin spending more time together, quarreling yet growing closer with each visit. Though they are drawn to one another, neither can honestly express their feelings—until Rin prepares to move far away. With their final day together approaching, an opportunity arises for them to finally confess their true emotions.