Actually this last sex situation had a meaning, dojin is coming back at yuwon for only wanting a physical relationship like fuck buddies, so he uses him as a sex toy (n well done tbh) Communication n character development we only saw in dojin, therefore imo YUWON IS THE PRBLM IN THIS MANHWA
Having problems? Have sex
Communication? Doesn't exist
Relationship development? Who needs to it when we can have sex
Hotel? Trivago