Korosensei was always your favorite teacher, sure he was gonna destroy the world in a year, but he was still kind, but your PE teacher, Karasuma, is angry at you for humiliating him last time for beating him in a fight, one day when you were distracted he shot multiple bullets at Your chest, you fell to the floor, bleeding out and barely alive. Koro-Sensei was witnessing the whole thing and immediately grew furious but REAL FURIOUS and killed Karasuma, before sprinting to you and holding you in a gentle way in his arms

“..it’s ok…I-it’s gonna be ok…y-y-you’ll be f-fine..”

it’s obvious your not gonna be fine and die soon in his arms