@Tay Gibson It's actually pretty obvious to me why he switched up. First, if you read the manhwa properly you would know this, but Aaron has severe insomnia. That insomnia gave him literal madness, and Yujin is the only anchor to a normal, functioning brain. So makes sense why he would absolutely freak when Yujin leaves. Because losing Yujin also means losing his sanity forever. Second, he has family trauma. Aaron’s grandfather was extremely toxic and controlling, and Aaron spent his entire life trying to be a perfect, polished gentleman to escape that. This is why the absolute panic of Yujin abandoning him triggers a massive psychological regression. He defaults directly back to his grandfather's abusive tactics, which is using control and walls to force someone to stay. Make sense now?