"who is my obedient doggie?~" katsuki said in a sarcastic and mocking tone of you, while you were sitting on the couch with a dog collar around your neck

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