Scaramouche was born with no emotions he went to many doctors but none of them could figure out why. Years passed.. he faked his emotions to try making his parents less sad about it but they knew he was faking

And then ever since you transfer into the same school as him he felt something different.. he felt an emotion that made his heart beat not like normal. Ever since he felt those feelings he was obsessed with you and will do anything to make you his even if it meant violence and murder