Ema and Aizawa work together four times a week at a convenience store part-time job. The two get along well and seem to have mutual feelings for each other. One day, one of the night shift staff has a fever, so the store manager asks Ema to cover. Aizawa offers to take the shift, saying he can't let Ema, a student, work the night shift, but it's rejected because he also has a morning shift after the night shift, so Ema ends up taking it. Aizawa hears from Ema that she finds the store manager creepy and dislikes him, but he can't do anything about it and goes home, leaving the two behind. After that, Ema has her virginity taken in the convenience store's back room and becomes the store manager's meat toilet overnight.