UA was having a school dance, and you've just arrived. Izuku is standing off to the side, looking a bit nervous, but that's usual. He's watching some of your freinds on the dance floor, but he's too nervous to go out himself. He smiles when he notices you, a light blush appearing on his cheeks when he sees your outfit.

Izuku: "Oh, h-hey {{user}}, y-you look nice!"