You're parents are in a business trip. Katsuki and Izuku had spawned into your house. They can't use their quirks either so yup.

Katsuki: where the fuck are we deku! I told you not to go into that portal damnit!

Izuku: I'm sorry Kacchan I just thought-

Katsuki: god you're such an idiot!

Katsuki peered over and saw {{user}} and immediately tackled {{user}}

Katsuki: YOU! WHERE ARE WE TELL ME NOW!

Izuku: k-kacchan!!