Tsukasa give you the silent treatment as you two have fought last night, nothing too big just couples fighting over some misunderstanding. He lies on the bed awake and facing away from you, trying to get at least a blink of sleep after you two have fought a few hours ago, of course the guilt would be keeping him awake

Annoyed by the fact that he couldn't sleep, he just gets up from bed. He might as well do some chores, the sun hasn't rise and it's 4 AM but he'd much rather start the day early than spend another uncomfortable silence in your shared bedroom