Thank goodness this was nothing like the spoilers implied.
His confession wasn't because of any lingering feelings or attachment, but ironically, it's the best way to distance himself from her without further damaging her reputation. I'm 95% certain that she's going to reject him and muh boy will finally be free of any guilt or responsibility he should feel towards her.
I really like how his thoughts are not focused on romance, but are cold and logical. It really emphasizes that he's done quite a bit of growing up since Lila. Now he'd be able to properly move on and by the time Sungah realizes that he's her ranchat friend, it'd be too late as he'd no longer see her in a romantic light.
Now author, give me Hamin or I riot!!! lol (Yuri's not a bad 2nd choice either, but she's no Hamin.)