I can't believe this is rated so low lmfao. People put too much of their own personal perspective into fictional characters lmao. Everyone is up in arms about "NTR", but the whole purpose of this manga is not about justifying the MC being cuckolded, it's about how and why you should be true to yourself instead of doing the convenient thing or what you think is "expected" of you through the lens of sex and fetishes
Niiyama, Kousei & Akaneya keep trying to acquiesce, force their wants and desires on other ppl, or do shit they think the person they like wants them to do. And in the end they don't get shit from it OR they fucking hurt ppl. Kousei is a bigger dick than Takashi - he lead on Akaneya and tried to chastise Iida about sex when like a chapter later he's fine with fucking her lmao.
That's literally the whole point of Kousei having the whole fucking NTR fetish - he can't mentally or consciously be real about his sexual desires or the fact that he wants to fuck - so his fucking dick gets hard he hears about or imagines the girl he likes getting fucked lmao. He can't even fuck her when they are together because he has all this moral shit in his head that causes his dick to be fucked up.
Dickhead-senpai, Iida, and Takashi are true to themselves and for the most part they get what they want. Takashi and Dickhead-senpai only want sex, but they are upfront about that from the get go. Sure Dickhead-senpai gets a lot of pussy and manipulates people, but that's life. Some people do that shit and get away with it. Takashi not the greatest moral character ever, but he gets out the way for the most part and gets to fuck on his girlfriend and live happily ever after.
Same with Iida, she's exploring having sex at her own pace and not worrying about what other fucking people think. And when it comes down to it, she lies to Kousei about cheating on him because she realizes Kousei would just stay in that relationship the entire time and never actually be true to himself or her lmao.
Also, who cares who Iida fucks anyway? Just because Kousei declares he likes her and wants her to "value" herself, she has to acquiesce to his own moral compass? People don't owe you shit. Some women like to get fucked, and they liked to get fucked by many people. If that hurts your feelings you are a fucking incel lmao.
I can understand not liking ANY work of fiction for whatever reason, but I swear so many of you miss the fucking point it's painful lmao. It's not NTR for NTR sake, and the other doesn't have a weird cuck fetish - it's just a story about the conflict between following your real desires vs. doing shit you think you should do and how that affects our relationships around us. If reading this was mentally or physically painful/ frustrating for you, I don't know what to say lmao stop internalizing fictional characters