
Saying that she's imposing on him, and forcing him to accept her feelings whilst disregarding his. Feeling all sorry for him.
As if he didn't do all that and worse to Senpai right from the beginning. He's getting a tiny spoonful of his own medicine and look how he's handling it.

Read the manga again. Senpai had all the ways to get out of the relationship since forever, and reading the mangaka's notes, it seems senpai had a special bond towards Morinaga since the beginning, but —In her words— he was slow at realizing it.
Morinaga had never had malicious intentions and he doubted himself all the way.
The parents did seem to have malicious intentions before; they even dishonored him publicly, so it seems the mom has a bit more of a conscience than the dad, but her actions are not karma for Morinaga; her actions are repentance of her own. You can't expect a victim to get "karma" for an unrelated matter from one of his previous abusers. That's... weird...
Your analytical ability lacks a bit, as I said, re-reading might help you.

I've re-read this manga many times.
And each time Morinaga still rapes Senpai. Multiple times. He takes advantage of the fact that Senpai is lonely and threatens to leave him. He forced him into a sexual encounter in the middle of the street, even though he knows how reserved Senpai is.
Even though he says he cares about Senpai's feelings, his actions almost always prove otherwise. He continuously ignores how pressured he makes Senpai feel and only truly cares about his own feelings most of the time.
Senpai possibly having closeted feelings for him doesn't change any of that. If anything, it makes all of Morinaga's actions worse. I can sympathise with him feeling rejected and different from everyone else, and I think that's also one of the underlying reasons why Senpai bonded with him.
But acting like what he did in the past is fine because it wasn't "malicious" shows a severe lack of analytical ability. Would you say the same about a parent who beats their child to discipline them because they want them to be a better person in the future? I hope not.

Morinaga only wanted to leave because it was painful for him to stay by senpai with the feelings he had for him... Senpai was one who never usually cared for other people much that's why Mori thought it wouldn't affect him...
It was made extremely clear in early chapters that souichi didn't really have a problem with having sex with morinaga, he was just busy most of the times... And then in volume 7 senpai realizes it for himself the reason he did it with morinaga wasn't because morinaga "blackmailed him" it was because he wanted to...
Senpai isn't also that innocent of a character when you think about it, even after knowing about Morinagas feelings for more than a year, he would be blatantly homophobic, he would take out his anger on Mori about how much he hated gays
What happened in early chapters between Mori and senpai is definitely not overlooked! Both of them aren't perfect characters but they do in fact love and care for each other a lot, and they show it!!

More proof that Morinaga always prioritises his own feelings over Senpai's. He didn't leave because he felt guilty about raping him, he left because he couldn't sincerely love him.
Senpai has always been very caring but he just shows it in a very tsundere/atypical ways. Why else do you think he let Morigana stay around him after he confessed his feelings? The whole think with that stalker happens because he cared around a random woman of the train with heart issues. And he always takes care of his family too.
And if you really think Senpai didn't have a problem with being raped by Morinaga right at the beginning after that, I suggest you go and read those scenes again. He told him to stop and that it hurt, he was angry and even cried in the shower afterwards. Even for a tsundere, that's definitely not the reaction of someone who wants to sleep with another man.
Plus he had his trust broken by someone who knew he already had trauma from a previous rape attempt. It must have been even more painful knowing that Morinaga saved him from a would be rapist, only to become the one that would rape him later.
The only thing Senpai is guilty of is being openly homophobic but, considering all the negative experiences he's had with gay people (including Kurokawa who he caught trying to kiss his unconscious brother), it's really no surprise that he doesn't react well to them. He's a victim who was lonely and unfortunately had feelings for his rapist before the event.
I agree they're both not perfect characters and that's why I like the story. But I hate how everyone pities Morinaga as if he's done no wrong and ignores Senpai's trauma just because he tries to stand up for himself.

Senpai has no trauma, and no one is pitying Morinaga here.
Did you entirely miss the part where Senpai says to him, "If I had fucking hating it, or if I REALLY didn't want to do it, I would have fucking killed you instead of doing it."
Senpai is strong and hits promptly. If he didn't want any of it he would have reacted a lot harsher.
Senpai himself cleared the waters between them.
And no, senpai is NOT ONLY guilty of being homophobic, he has many, MANY issues and flaws, but people tend to sanctify him just for how ambiguous that first night was.

What do you mean Senpai has no trauma? Do you not know he was almost raped by a professor before? Or do you mean he wasn't traumatised by Morinaga raping him?
Are you forgetting that he was drugged the first time? He physically couldn't stop Morinaga but made it very clear he didn't want it at the time. Therefore it was rape, no matter what he said afterwards.
Senpai is proud and he cares about Morinaga, which is probably why he said that before. Or it was about their second time which he consented to but I'd still say he was pressured into that.
Name some of his many issues and flaws then. Like I said, he's not perfect and he deals with things in ways that most people wouldn't but that doesn't mean there's anything wrong with it. Aside from being homophobic, the only other main issue with him is his temper.
It makes more sense to sanctify an actual victim rather than his rapist.

Yall villainize Morinaga sm for the first night with Senpai, but the story itself doesn’t really show it as lasting trauma for Senpai. He even admitted later that he delt with Morinaga wrongly, saying their fault ratio was 9:1. But besides that, both of them apologized and moved past it long ago, so why do u guys still hold that moment against Morinaga sm..
Mori has a lot of trauma from the past and you could see how it might have shaped his character...(not saying I justifies his wrong actions but) He felt guilty afterward, so guilty that he was ready to leave because he didn’t believe Senpai could ever forgive him and didn’t want to risk hurting Senpai again. When Senpai said it was blackmail Morinaga agreed because he truly believed Senpai just needed an excuse, because why would his Senpai, someone who doesn't usually care for other people...someone who took a year to remember his name, care if he stayed or go, and why would he let Mori sleep with him even with how homophobic he is?? In his words, he could only put up with it because it's 'him' and he's 'special''...

I know it's fiction, but you're worrying me... this manga is the manifestation of a fetish for violence, and it's okay to admit that, it's not like it's a deep story - he attacked his frustrated friend to release his own frustration and we have fun watching, just please stop pretending that these actions are acceptable.(⊙…⊙ )

Not sure how you got projection, a thirst for rape trauma, and the idea that I know better than the author from my post.
I'm just interpreting what the author has shown us the same way everyone else is. Rape is traumatic no matter how physically or mentally strong you are. I don't think you don't need to be a genius to know that much.

Of course we villanise Morinaga for raping Senpai because rape is a gross and villainous thing to do! You might not see how Senpai has been traumatised by that night but that doesn't mean the signs aren't there. It's clear as day to me.
Sometimes domestic abuse victims excuse and try to justify the actions of their abusers. That doesn't mean that they haven't suffered from abuse. Senpai eventually recovered from his trauma enough to initiate intimacy sometimes because he has feelings for Morinaga and considers him special. None of that changes the fact that Morinaga raped him.
Why are you so keen to protect the rapist and acknowledge his trauma caused by words, yet deny/downplay the victim who was actually physically assaulted?

An arrogant rapist who treats everyone else around him like crap.
He had two people on his side when he was younger, the coach and his coach's mum, so he wasn't all alone and that's not why he turned out worse than Dan. He has every right to be angry and upset about his childhood. Nothing gives him the right to take that out on the people in his life.
The difference between someone redeemable acting traumatised and someone who is a lost cause is genuine remorse, their willingness to apologise and right their wrongs, and their resolve to never repeat their mistakes.
JK han't done any of that. He's still only ever thinking about himself. And that's why he's one of the worse toxic semes I've seen.

It's one thing being genuinely naive and falling for a bad guy (which is already boring and frustrating enough).
But it's quite another to know you're dealing with an a-hole and then choose to ignore all of his red flag signs (and then cry about it afterwards).
Why do these authors keeping making these characters with personalities at the start and then turning them into annoying pushovers? Ugh...
Just when I thought I couldn't love Euiyoung more, they put him and Haewol in dinosaur outfits