Responses
I agree with you, every action of Yechan in these past few chapters subtly shows that he likes Jun. I always pause whenever they interact and oh boy he really softened with him a lot. The author is good with hinting it
yknow how stories tend to spoon feed information to the readers. giving them a thought bubble or marking the panel with the expression or using up panels to show the characters feelings, so you can directly read what they're trying to convey. but thing is this author doesn't do that with yechan.
the way yechan's feelings get showed is quite minimal. on surface he's just a sex crazed man, but he's actually pretty interesting. we don't get much of yechan's thought process, to a point that even though I believe he's starting to like seokjun, at the back of my mind there's a slight thought that all of this is just for his dick. He doesn't overtly show it, which makes seokjun and even us the readers, question what exactly is the standing of their relationship.
but that scene where jun was begging him to let him stay and the fact that yechan got pissed off by him saying he's only keeping him around for sex, proves that he does like him and it's really fun to see with how subtle yechan has been at expressing his feeling all this time