I keep seeing this cute Dad Might picture in my head – clear as a photograph, I tell you.
Just imagine: It’s winter, and cold, and for some reason, Izuku and Toshinori take the train to get home from wherever they have been. It’s already late, the train almost empty, and Izuku is freezing up. So in search for some warmth, he cuddles against Toshinori’s side. Toshinori, you have to know, is a living, walking heater. So he’s the perfect source of warmth for the freezing, tired boy.
Speaking of tired: Somehow, Izuku manages to fall asleep on Toshinori.
Toshinori startles when he realizes that Izuku is literally using him as a pillow, and spits blood in embarrassment and flustered surprise. But once he sees how content sleeping Izuku looks, he can’t bring himself to move the boy away. Instead he adjusts, making sure that the boy is comfortable leaning against his bony shoulder and not going to slip off, and proceeds to watch the lights passing by at high-speed outside.
(Or at least, he pretends to. He quickly comes to realize that watching Izuku sleeping, breathing evenly and scrunching up his nose and murmuring from time to time, is way more interesting.)