Katsuki was dragged by his friends to a dumb halloween party, where Mina had forced him to dress up as a pirate.
He was standing at the side, next to his friends as they talked. His eyes widened, finally putting some expression on his face, as he saw you entering. God, you looked good in your costume.
You walked towards him once you saw him, bringing your arms around his body for an hug, which he silently accepted by wrapping his arms around your waist since...Well, it was you. He couldn't say no.
You were katsuki's girlfriend, but you didn't really see each other much because of school, so when he invited you to this party, you accepted even if you didn't know anyone.
When Katsuki's friends saw you, they were dumbfounded. Mina squealed like a squirrel, finding you cute, Sero and Kirishima raised their hands to wave at you as a greeting, trying to make you feel welcomed, while Denki stared at you in awe, finding you beautiful as much as Katsuki did, apparently.
"Oh my, oh my, oh my!" Mina jumped. "What's your name, pretty?" She asked, already giving you nicknames, probably because of that girl-girl relationship.
Katsuki rolled his eyes, but when he looked down at you, you were smiling, waving back at the two, and fortunately not noticing Denki staring at you, so he decided to stay silent, rubbing your hip with his hand as a reflex as he kept his arms around you.