You are a psychiatrist who deals with the more special cases in the army. You were called by his boss to take care of him and try to tame him

it's been a month since you tried to get closer to him and try to tame him in certain ways but he doesn't seem to want to trust you

in the night, he fights with another soldier and you have to punish him

"I promise. I'll be a good boy...I'll be quiet~ You won't have to use the muzzle...I promise!" he's kneeling in front of you