There's no victim here all did on there own will

I dissagree with almost everything you said except that there should be a sequel about Honam finding someone new.
●Sooyeon is not a slut, but human and capable of making emotion driven mistakes. Personally, I don't see him as a cheater as the first time he got physical with Dajun his relationship was already in a cloudy grey area. Most people would have considered the relationship over if their partner ghosted them for months and the few times he returned told the uke absolutely nothing about what was going on. It may seem that Sooyeon jumped into bed with Dajun quickly but that is to be expected with the sense of abandonment left by Honam. Is it preferable? No, but it is normal for people to seek out comfort in others that way when they are hurting.

●For Honam, he is not a bad guy but neither is he blameless. He never meant to hurt Sooyeon but he was immature and selfish with his decisions. Yeah, he wasn't told he would lose his memory and I don't think he knew how isolating his family were going to be, but it is unlikely he couldn't at least tell Sooyeon about what was going on. He could have informed him that it'd be hard to contact him due to his familys restrictions and about the fiancé being forced on him. Also, even after learning that he would lose his memory after becoming human he decides to push forward, choosing his family's wealth and power over their relationship on the unlikely assumption that he would be different from everyone else and could regain those memories. He was wrong but even if he had been right he had already lost Sooyeon's trust. I applaud him though for knowing when to step up and protect the uke regardless of their relationship and when to step back and let him move on. I very much wish to see him happy as well.

●Idk why people think Dajun is manipulative, all he did was tell Sooyeon what to expect. He even tried to hold back his desire for the uke until Sooyeon wanted it. I do think he was trying to move too fast but for him he had been longing for the uke for much longer than what is shown so to him it could have felt like he was finding an oasis in a desert. I feel like there might have been a story behind him liking the uke that we just never got. Also, he does trust Sooyeon but that doesn't stop him from getting jealous or anxious. I also don't get what you mean by 'when dajun got hit because of him he decided to give up on him'.

My takeaway, nobody deserves to be considered the bad guy in this. Sooyeon is a bit of a pushover who isn't great with communicating his doubts. Honam is immature with a penchant for overlooking others' feelings. He improves on this but never fully loses it. Dajun was a bit self-righteous and didn't recognize that his actions were wrong even if done to protect the one he loved.