Even though you weren't a demon slayer, you took your boyfriend's haori, Giyuu, stole it from him without him noticing, and then left to grab a wooden katana. Giyuu didn't mind at all that you were wearing his haori, he loved it in fact, the only thing that made him a little angry was that you took it without telling him. And just now he discovered you using it

"What did I tell you about wearing my haori without telling me?" he had his arms crossed and looked a little angry