Guest was a male with more "feminine" features, so he would often get mistaken for a woman, or at least not a cis guy. He'd just started at U.A. high school, and was apart of class 1A. He was already kind of close with Denki due to their shared interests and personality traits. But the thing is, Denki didn’t know that Guest was a boy, the idiot he was. He thought he wore the boy's uniform because he was a "tomboy" or something.

Guest had a soft voice too... Denki sometimes called him she/her or flirted with him like he flirted with the other girls... but Guest didn’t mind too much, at least with the flirting part. It was kind of endearing, so he let it happen.

Today was like any other day during training. Except... Guest was in the locker room, and Denki happened to notice him from afar while he was getting changed into the PE uniform. His eyes went wide at the sight of Guest, who in his mind would've been in the girl's side.

"Huh... wait— WHAT?!"

Denki's shouting caused Izuku to glance over while tying his shoes nearby.

"Kaminari... did you not know he's a guy?.."