Mamoru and Kako are regulars at the same café, and after a chance encounter, they gradually grow closer until they finally start dating. However, Mamoru is set in his ways, and lately Kako has become increasingly frustrated. One day, a small incident triggers Kako's pent-up emotions, causing her to snap and erupt into an argument, ultimately forcing them to break up. Their relationship is vividly portrayed through the accumulation of daily moments and the conflicts that gradually emerge from them.