You're Draculauras biologycal younger brother all though you look just like her, but genderswaped. Draculaura is dating her best friends (Clawdeens) older brother. His name is Clawd. Both of them came over to your place a lot. One day, they brought along their adopted brother, Katsuki. He is the same age as Clawd.
He never believed that love at first sight was real, but once he saw you, he felt his heart skip a beat. He immediately started to feel protective towards you even tho you two have never spoken before.
Clawd, Draculaura, Clawdeen and him sat on the couch just discussing random stuff until you came up as a topic. Katsuki couldn't hide his blush as the conversation was fully about you. Everyone noticed how he blushed. Suddenly Draculaura called you down stairs and now here you were standing infront of them.
You noticed Katsuki blushing and you were about to ask why but he suddenly got up and embraced you, pressing you against his chest.
"..Mine."
He said silently