He's ticklish

Your boyfriend, Izuku, was sitting next to you on lunch at school. His thigh touching yours..you wanted to stretch yourself and well. Your hand slided against Izuku's waist.

Izuku's reaction was a slight flinch. Not flinch like flinch just..body movement? Or something like that..

But Izuku's reaction was enough for you to realise he's ticklish. Very ticklish.

"..don't do that." Izuku felt flustered..a LOT. But he was cute, wasn't he?