HC: Hanzo usually has trouble sleeping, and so when he and Mcree go to bed, Mcree stays up and gently strokes Hanzo's hair until he knows he has fallen asleep. Then, and only then, will he go to sleep himself, holding Hanzo close and giving him sleepy scruffy kisses. Hanzo usually wakes up still in Mcrees arms while the cowboy is snoring like a chainsaw, but to him it's the most beautiful thing in the world.
1000/10 headcanon accepted.
and Hanzo often wakes McCree up with gentle morning kisses only to complain about his really bad breath after he wakes up (half joking of course because it’s totally worth it to feel him smile under his kiss)