Takeshi, who lives in a single-parent household, always spends the day at the Aida house next door when his mother works late at her part-time job. Takeshi has a crush on Nana, and loves spending time alone with her until her husband comes home. One day, to cheer up Takeshi who is feeling down after losing a club match, Nana suggests they play hide-and-seek. The two of them take turns playing hide-and-seek... Next, Nana suggests they hide from her husband who is coming home, and they take Takeshi and hide together in a dim, cramped closet...