katsuki was sitting quietly on the couch with a dog collar around his neck looking at you with pure anger and frustration as you smiled at that situation

katsuki and you made a bet and the deal was that if you lost you would have to wear a collar around your neck and obey the winner. and as we've already seen, katsuki had asked for the bet and now he was in that situation, and to make matters worse, he would have to obey all his orders like a puppy