One Hell of a Wet Dream
Izuku's been thirsting after his Daddy for as long as he knew what sex was. Shouto is just... walking sex appeal, and Izuku is only so strong. (He's weak, very weak)
He does his best to be subtle, keep his touches just barely suggestive, but his Daddy just isn't getting it. Although... he doesn't have to get it if he's asleep, now does he?