Rin!
I stopped reading after chapter 4 when I couldn't be happy about their unhealthy codependent relationship and Sou getting what he wanted after how badly he treated Katsura. I ship Katsura and Sakurasawa. He's sweet and cute, and genuinely cares about Katsura, unlike Sou who was just feeding his own ego, and had no right to get jealous. Even if he developed feelings, his ego was his only motivation for a long time, he knew he was disabling Katsura, plus he made him feel bad by acting like he hated it, then hurt him further by telling him he wasn't doing it because he genuinely cared (which Katsura is in denial about), followed by shocking him further by kissing him, then deciding it was all over without asking how Katsura felt about anything. It's almost like he *wanted* to hurt him, then Sou felt better while Katsura became more depressed. So self-centered. In the end, he's still dependent on Sou, and misconstrues it as love. Ugh. Maybe it develops beyond that but I dislike the main couple too much to keep reading. The brother is great though.
Aikata