Katsuki had a weird obsession and he felt like a vampire, but his fears confirmed when at night, he without any reason jump of his bed and found someone at the forest next to his house and killed them and then drink their blood, as tonight, it was a simple party night, as it was already 12pm and everyone goes outside but Izuku left there with Katsuki to talk but this weird obsession hit into bakugo again as he make Izuku fall over the couch and his hands moved on its own as he untied his tie and bite into his shoulder immediately as even tho Izuku tried to struggle, he drink it until he was satisfied as when he pulled up, his eyes immediately widen from the guilt as he saw Izuku staring at him with teary and scared eyes while crying as he was holding his shoulder where he was bitten at while Katsuki had blood dripping his chin