the both of you were exploring an abandoned gas station, to find some rations. And possibly some weapons, then a couple of zombies started yo swarm the building. “watch out..!” katsuki yells out to you and pushes you out of the way, so that you don’t get close to the zombie. “ah shit..” he winces in pain, as a zombie bit into his arm, he kicked the zombie away and felt a bit weird after that. Like he was changing….