Lmfao

Hahah yes he thinks he's winning, but I think eunsung is realizing that he can't fully predict soohyun anymore as well. He trusts him genuinely to be on his side, but he still can't trust him to open up to him and tell him everything. Though I think his distrust is rooted in his worry for soohyun's safety than his own situation. I think he's going along this park munseop situation now not for himself but for being with soohyun and using it to get closer to soohyun and also for helping his friend who is being raped there along with the others. He has mentioned that he would give up on painting after one or two paintings and he was sick and tired of it anyway.
You're right about eunsung knows how to operate soohyun, basically mainly because eunsung knows soohyun loves him but soohyun doesn't. That's his biggest advantage. But they have a long way to actually be something, since soohyun has thousand metre walls around him. Eunsung needs to work hard hahaha!
Actually the rape scene, I think to some extent eunsung did it so soohyun would stay away from him and this whole munseop mess. He did try to reject him a lot and then had him follow there and realized that soohyun was determined to poke his nose into this mess so he did all that to him, like nobody would bounce back from that, but soohyun showed up at his house after that and again after that. Their first kiss was initated by soohyun btw hahaha...the panel where eunsung realized soohyun kissed him and then he smiled and kissed him back harder. Which made soohyun freak out hahaha.
I think the deal they made, eunsung isn't playing with soohyun but is going along with him for his own entertainment. There was no reason to give himself away, like he didn't take time to think about it, he was like "lol fine. You can have me. I don't mind you making a mess of me." As a return condition, only to ask for soohyun to wear glasses like he did before. Eunsung likes soohyun in his high school form, and soohyun as well... in soohyun's mind eunsung is always in his high school form.
Eunsung's first palpable move is talking to kim minseok without telling soohyun. Which we still don't know what kinda deal they made. It's gonna be hella interesting hahaha~~

ALSO, the moment eunsung realized soohyun was exactly what he needed (aside some the munseop situation) is in the car scene after they made the deal when soohyun tells him to let go of munseop and if he can't do it, soohyun would make him scrape every trace of munseop from eunsung's mind and body. Eunsung smiled and kissed him for real since that was what he needed to hear from someone, and he knew only soohyun would be able to do that for him. He told him "Don't forget what you just said. It's a promise." And again in the hotel where eunsung told soohyun to "Remove every trace of munseop from him"
And many more instances, like during the exhibition, soohyun damaged the painting munseop had of eunsung, and then saved him from reporters hounding him at the exhibition and then even covered him with the coat in the car sex scene so he wouldn't get exposed instead at his own risk. Hahaha soohyun doesn't realize anything but eunsung is always taking note of these things soohyun does for him that actually mean a lot to him~~~

You're welcome! Thank you for appreciating the work in the native language... its certainly the best~~~~ I hope the English translations do it justice soon ;_; it hurts me sm that people can't read or appreciate the story because of them

Yes I agreeeeee. The relationship is twisted I guess in the extremities Soohyun is willing to go for Eunsung but if its only between them, the relationship can be quite healthy once everything clears up owing to the fact that Eunsung actually reciprocates - since high school at that haha. If he didn't, the story would probably be stalker game-ish hehehe whatnot with blackmails etc or there won't be any story - ie all Soohyun's effort not working because Eunsung actually don't need Soohyun's help, the rape would not have taken place because Eunsung only did that because Soohyun's his type and ofcourse Soohyun kinda giving green light by all his cute 'hate' questions which makes it clear that Soohyun's into him. It's no excuse for rape though but I think Eunsung only did that because he was sure Soohyun likes him and he also likes Soohyun.
Ahh I really like how you worded Soohyun's realization - that must have left a very deep impression on him translated to all his strategies where he will do anything to make Eunsung looks at him even by force at his own detriment. Yes, most people will want to be equals in relationship even in the form of trade off (like beauty with rich etc) - it is rare someone will be satisfied in unequal partnership as usually both will see values in each other that makes it all equal. In the case of Soohyun being hyper-aware of
Eunsung's other worldliness (maybe inferiority complex, maybe just the truth) he subconsciously realizes that he needs to be equal with Eunsung to have a chance at a relationship hence his happiness when Eunsung is conflicted because he is now closer to having Eunsung. Even his monologue in the line of if he can't go to the top with Eunsung he'll make sure Eunsung stays at the bottom with him shows his perception of needing to be equal for something to 'happen'. But he also hates seeing Eunsung all weak and traumatised so he tries to be 'useful' in his own way.
Eunsung on the other hand, had always seen Soohyun as an equal? because he doesn't really value his inborn talent because all it did for him was to be forced to satisfy everyone else. So what Soohyun values in Eunsung is not something he really values so there was no basis for inequalities at all. Eunsung even values Soohyun honesty and 'kindness' idk lol so seems like they're on equal footing? from the get go hehehe I mean that's how crush happens - when we put positive value to the other person less there won't be
any attraction at all.