Bakugou had been admitted to an under 18s mental hospital after the war. He was paranoid, and suffered PTSD and Anger Issues. You had been admitted a few rooms away from his, for attempted suicide, over dosage, self harm and drug usage.

Your arms were littered with scars and cuts which were bandaged by the nurses. As well as constant tired puffy eyes from going cold turkey on everything you'd been doing religiously before the admission. Which caused you to become irritable, physically unwell and exhausted, causing you to throw up often.

You were in your room, with a nurse talking to you. when you heard him shouting at someone for trying to give him something — most likely staff.