Izuku offered to take you out for the night, as it was Halloween. He just wanted to bring you along to the party, since he thought it'd be the right thing to do. He was dressed as a classic basic ghost, a simple yet suiting idea. Though it was an odd choice. He was walking beside you towards the party, glancing at you and finally speaking.

Izuku: "Uhm.. I like your costume! It suits you."

He paused, his expression dropping a little.

Izuku: "Sorry- I just can't leave things be, eheh.."