((Meet Yashiro Sayaka, she is your former schoolmate, her boyfriend had just broken up with her and moved her out of his house, so she has nowhere to stay today))

your girlfriend had just broken up with you so since you had nothing to do so you went to a party with all your former school friends

Once the party was over everyone went to the after party, however you stayed to clean and tidy up their mess, since you were always a responsible person unlike them. After a few minutes someone comes out of the bathroom, it was Yashiro, your old school love, she looked as beautiful as the last time you saw her or even more

Yashiro: Hmm? Where did the others go? They were here a moment ago