
I think most manhwa only readers won't know this. So I will go ahead and say, Train Molestation and Stuck-in-a-Hole to be used by Strangers Sexually are both a kink in Japanese BL/Hentai/Porn(never seen one for GL). Like there are even dedicated tags.
This may be the first time I have ever seen such kinks in a serialized work and not a dj or one-shot, and both tags at that. Maybe author-nim have come across them a few times and inspired by them.
I'm not personally that comfortable with both and I avoid them but if you're into BL long enough you end up seeing what you don't wanna see one day.

And why did I even read this is one of them. I mean I don't even get what's the point of the story is lol. I thought it'd be smut bur they didn't even show it all. It's not about the characters as well, since almost nothing is known about them. Plot and message? To read carefully before you decide to call a rental lover? Ayy sir, noted.

I was a tad bit uncomfortable when Han and Param slept together. I just skimmed thru that part. It wasn't exactly Param cheating since he and Hwi weren't in an official relationship yet. Yet... But I felt so bad for Hwi.
It's just that I really love Hwi's character. He came off as some kinda jerk at first but he showed his sweet, warm sides as we get to know him and even when Param treated him wrong one or two times he was forgiving and understanding.
Param wasn't at entirely at fault as well, it's his body so what can he do.
I blame Han for being pushy there. Urgh. Your sad backstory doesn't justify everything bro.

This dream power thingy is genetic on FengFeng's side, right? Then why is Bighead(gosh I hope this cute baby gets a legit name soon) kinda keep appearing in connected dreams with YiYi and RouRou? He ain't even a blood related brother of RouRou? I'M IN CONFUSION.
One thing I can think of is like how RouRou can summon YiYi into having common dreams, he could feel a special connection with BigHead and unconciously reached out, I guess.
I'd be back in my office or whatever since like the first few lines of that conversation, I wouldn't give enough shit to endure that obvious taunts
"Oh, if you say so Mr.Cha. Let's hope the competition goes well, shall we? If not, it's be too sad to see you being considered as a factor leading to his downfall and torn apart by the public. Baiiii~"