Huh...

Hi, I am kinda of specialist in this so I can answer some of your question
The nightmares, self harm and so on came out of guilty,
he felt guilty for hiding the fact his father killed his mother so in his confuse childish and traumatized mind he might as well have killed her
while his knowledge of what his father is capable of, the power he had on him and the plain abuse, made him terrified, but as a powerless kid who was told so, he trough "the problem is me" so....more guilty (very common response to abuse)

What this very non professional "doctor"(urhg) did was,( in a unhealthy and barely controled environment) "aliviate the guilty" (make him do comunitary service until exhaustion, therapy for him to understand that a kid is never at fault and so on were all better alternatives, that doctor is just a predator btw)
Anyway with less guilty mc started to see things clearly about the origin of his guilty (slowly obviously and the story depicted well how the mind can just "shut up" what you can't handle yet)
when mc started to permit himself to resent, hate and point fingers he started to confront the fear he had for his father
....until he was less afraid enough to admit he was afraid
From the moment he realized all this time he was feeling guilty and blaming himself cuz he was just a kid afraid, he realized (obviously) a kid didn't had any fault on it

and that his father he feared so much was only a pathetic man, and that mc was actually the one in power

Thus mc can move forward, confront his father get rid of the guilty and such,

this experience clearly gave him the clarity of understanding himself better and gave him the tools to deal with future adversities,
so I believe as the smooth talker, with a good education and pretty boy he is, his life will be easy moving forward

About the bdsm stuff, to me it's clear that he didn't enjoy the feeling of his mind going blank, letting another person have the control and playing roles particularly, in all sessions all he did was feeling and working on his bottle up emotions, his "motives and origins" was always present....he MAY still learn to enjoy these things later
BUT with his "reasons" out of the way most likely bdsm will grow boring to him (like the rebellious fase people who grew up in rigid household experience that goes away once they become free)

Also mc seemed okay with liking and being liked by another man soo I don't think it was a "out of need" feeling
Pluss he is normal in other aspects so no all the messed up stuff we saw was just trauma
With trauma out of the way I think he has very good social skills who didn't seem to take a great amount of tool on him compared to the pression and situation he was under (so it's inherent of him)
Also mc friend perspective that he is indeed a naturally "manipulative" person (a good trait that indicates emotional intelligence)
And at the end he seems way more open to other people so I can see he making more friends and his grumpiness seems to be well directed so obviously he may end up being a pleasant person to be around but who knows if he will prefer a big group
I don't think he will become a full social butterfly he could have been whitout trauma even because he is pretty aware of people bad side and he will probably prefer having low attention on him, but he will do pretty well whorever he decides to do

dunno if he will tolerate being constantly reminded he is his father son, my guess is both moving to another city or even country

That was very in-depth and interesting to read, thanks ^^ I had even forgotBout it, but when read your words I immediately remembered what manga this was and what happened in it. Also, just out of curiosity, but how did you come to be so knowledgeable about this? Sorry if I am being rude, but did you pass thorough something traumatic or did you study topics related to it? I’d love to under how you came to be so immersed in a possible random comment of mine and taking your time to give such a profound answer…

This makes so much sense especially the guilt part and how it was related to those orgies, the more he let go of the less guilty he felt and doing it with his brother was kinda like the last straw to unlock the root of the guilt. Thank you soo much for such a detailed explanation.

Hey ik this was a while ago but can you go a bit more in depth on how manipulative-ness can be seen as a 'good trait'? I always see it being brought up in day to day interactions as a negative trait so it'd be nice to see a different perspective than the usual one I see.