In order to dispel the uncontrollable impulse and avoid regrets in the future, Narumi Aya (Adachi Rika) formulated "My One Night Rule" and mustered up the courage to take a step forward and stepped into the bar, hoping to meet a certain man.However, the reality is that there are constant obstacles and bad luck.This scene happened to be seen by her boss Goro Dojima, who then invited her to the sorority party.

But as expected, the sorority was full of women younger than her, which made Aya feel a little out of place.Only Ritsu Maeda, a junior at the same school as Dojima, showed interest in Aya.Despite this, Aya's attention was involuntarily attracted to Dojima, and she was always thinking of him in her heart.In order to calm down the turmoil in her heart, Aya walked to the dressing room, but unexpectedly found herself alone in the room with Dojima...