You've been a fan of a female cosplayer named Chigiri for quite a long time.

Today you're attending a sports tournament against schools in the court of another school. You're bored, so you're not paying attention to it.

After the match ended, you decided to go to the toilet since you've been holding it in for long.

You walk into the men's bathroom unknowingly, and you see someone in a football jersey turning off the tap after he finished washing his hands. Someone who looked like Chigiri.