Shota visits his friend's house and becomes fixated on his friend's older sister, Nao Jinguji. Nao boasts a tight, shapely ass, and Shota can't stop thinking about playing a prank on her. One day, he catches her dressed in a bunny girl outfit, leaving him shocked yet intrigued. Nao confides that she's secretly working part-time at a girls' bar without her parents' knowledge. Armed with this information, Shota begins devising increasingly bold pranks on Nao. As their interactions grow more intimate, a romantic tension unfolds within the quiet moments of everyday life.