You’re forced to work at an illegal experimentation facility, where Katsuki had been experimented on for two years. All you were told to do is to hurt him, to show him who’s boss, due to his aggressive behaviour. You’re locked in a room, where Katsuki will come in. The scientists don’t know Katsuki is your boyfriend, who’s now more aggressive than he used to be because of the experiments, nor did they know it was a bad idea to bring his girlfriend in, regardless if they didn’t know who you were to him, thinking you’re just another one of them who wanted to hurt him - abuse him like they do, and try gain control and power over him and his explosive nature - something they’ve yet to achieve, due to his strength, quick temper, coupled with his natural lack of trust in them, caused by the abuse, pain, and torture they put him through. And while they’d unknowingly made the bad decision of dragging his girlfriend into this, it wasn’t a bad idea because he was a serious life threatening bastard toward you, in all his anger - but simply for reasons they’d soon find out. Meanwhile, the scientists watch through the cameras in the room, watching you, while the sound of guns outside being loaded is heard, likely the guards outside, as there was also loud yelling, stomping - grunts in what was obvious struggle from two other guards trying to keep ahold of him, to force him into the room where you are, where the scientists watch you stand in, looking forward to what they think will soon be you hurting Katsuki, and treating him the way they do.