With that being said, I could kind of relate to the sentiment of some of the guys hating on the manga lately which pushed me to go ahead and reread the manga from chap 1 since it had been 2 years since then and I stopped following the manga after catching up, picking it back during the whole summer school arc. After reading everything in one sitting I actually grew to like the story alot more, with the beginning all the way up to Shiina's introduction definitely being the peak for me.
Even Akito's character and arc was actually alot better than I remembered it being (I've seen the light
@Anonymouslylewd), with me initially hating on her character and arc but I think its because I read the retconned threesome which had Gotou swear loyalty to Agawa which made him seen alot more hypocritical. Speaking of the retconned threesome, although I did like how the threesome itself was handled originally and am still interested to see how the loyal Gotou would have ended up I think the new more flawed version of Gotou works pretty well - being more realistic and entertaining after going back on it. Of course, I never originally saw the whole ntr teacher part and definitely think it would have tanked the story so I definitely think the retcon wholistically improved the direction of the story.
However after rereading I can now clearly see what my issues with the current story is, it isn't that Gotou is retarded but more so that I feel he's stagnated in terms of how that mental deficiency is displayed. He has always been driven by his libido ever since he chose to fuck Agawa despite fearing he'd be another fuckbuddy and regretting it later. He tries to differentiate himself from the other guys to rectify this however when Shiina comes onto him he folds which is fair enough however he makes a compromise with his morals and lust by having a threesome. Originally it seemed that Agawa had more of a problem with the threesome due to Shiina supposedly stealing all her crushes however it seems that has been dropped so I imagine she was just uncomfortable having a threesome with her half sister (not uncomfortable enough to have reservations about tounging her though 😭). Overall it was a good development imo.
Then when Akito is introduced, Gotou tries to be straight up and honest, trying to avoid using her and wanting to focus on studies, turning down Akito's advances and even offering to be her friend. Eventually Gotou relents though because although he is able to resist Akito trying to seduce him, her being brought to tears by kissing him which pushes him over the edge. Despite succumbing to his lust though, he incorporates his advice from Shiina and Agawa during the threesome to make Akito's first time amazing for her - which is good progress for Gotou as Agawa initially said he need to up his skill as his stamina being the main reason he enjoyed it meanwhile Shiina has a virgin (and cucking) fetish so naturally she would be inclined to enjoy the worser Gotou as well.
Then during summer school Gotou tries to lock in again but due to spite towards Inukai, fucks Shiina but in doing so, comes up with a (faulty) solution to his problem by simply having sex with all three girls as his own partners rather than struggling to decide between staying loyal to Agawa or not.
After this point is where the story starts to drop off though. The whole ED, Shigechi rehab stuff was mid - the concept itself of Gotou realising his new persona won't get him what he wants and realising his threesome plan is delusional is good but the execution is off. Shigechi was someone who cared alot about status and looks so even if she was definitely fascinated by Gotou, I feel that fucking him that quick didn't have the same logical basis as the other girls (but maybe that's a sluts way of seeing what all the hype's about). The bigger issue is that, previous sex scenes did contribute to the plot as Gotou would lose to his lust but at the very least would show some progress in mentality or skill (threesome instead of solo fucking Shiina, being considerate of Akito's desires during sex, trying to solve his issue with lusting after all the girls when cucking Inukai) - the main problem was solved by Shigechi talking to Gotou prior so I feel the sex scene was largely there just for fanservice/indulgence from Takeda.
Best to let this arc finish but currently it has the worst intro of them all lol.
Overall, top 3 sexiest scenes have to be:
1. Shiina making out with Gotou and then asking Agawa for permission
2. Shigechi berating Gotou while making out with him
3. Agawa calling Inukai to tease Gotou into fuck her