So I bought the 33rd

[SPOILER]
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The kid who had some issues between the first chapters is mentioned again (don't remember, maybe it was the first ten?), and Yuri agrees to something he'd typically find annoying just to know more about the kid's situation with Sunwoo, as it seems Sunwoo was trying to help him.
The kid Yuri is tutoring, another student of Sunwoo's, mentions his classmate with the issues and bribes Yuri to take him on a trip if he wanted to know more about it lol
So, it seems Yuri is inadvertently worrying about him, because he maintains his sucky attitude but constantly wonders why Sunwoo looks so depressed, why he's wandering around, doesn't even pay attention to people talking to him if he happens to spot him, etc. I'm not saying he's in love, because he's not, but I hope his horrible attitude starts taking a turn for the better since he's finally worrying about someone else who's not Heejoo, Yohan, or Park.