sorry for how late this reply is but i was embarrassed to answer it in an honest way and not through a rpf lense because i felt like what i thought was going to be disappointing.

since chan is undeniably a workaholic - and jisung, too, for the most part - i feel like the dorm was very quiet and they occupied themselves with work, quiet time, hanging out with their friends (who arent stray kids), maybe jisung seeing his family, etc. but i do like to think that there were moments where they crossed paths and jisung would maybe knock on chan's door, or vice versa, and ask if he wanted to order take out or something. go to the studio together, you know. i dont think either of them felt awkward or had tension but i do think, maybe, they were a bit bored LMAO. i see chansung as a friendship/companionship that is very comfortable with not talking/interacting in a day-to-day capacity but still acknowledging their closeness, because of the history and respect shared between them. but i know when they do get together they have so much comfortable, care free fun. i love them so bad.