Weeeeeeeell, yeah... she might be confused...
But u don't go after your "bf's" boyfriend and even worst, not when u know how much she loves him.
Idk, maybe I need to be more open minded to see it like you do. But... I don't think that's right and certainly... I don't really like her character.
(ب_ب)"
See, look through it in a highschool sort of percepective obviously I am not justifying her action, what she does is wrong and if you have watched the anime you'll see that she does realize her actions. This is something that happens in highschool every now and then but Nina has a character depth. In her case i'd rather pity her than completely hate her. Initially I didn't like her either but when i started to observe I just felt sad for her. That's about it yk.
Something that you are ignoring is about the Japanese culture in teenagers, something that they put to the head is that the girls don´t have sexual desires, and if they have something similar (inferior to the men (︶︿︶)=凸), they only have sexual desires to their "true love".
And something similar goes to men, because men are "sexual beasts", they cannot help but want to have sex with EVERY SEXY WOMAN (And if not, they are cowards or gay), except if they find "true love" that she will cure them of their inevitable sexual urges, except if love disappears (That apparently the woman is destined to love the same man forever, while the man can change his mind due to his indecisive nature), then he will put the horns, and it will be her fault.
This is the ideal of male-female relationships that Japanese society teaches young people XD.
Izumi is FAR from shitty bf. His reaction was pure biological. He never saw any character in a sexual picture and he was getting heavily uncomfortable with nina's approach. He was confusing his uncomfortablness to doubting his love for the mc. Like I said, they are teenagers going through puberty, learning about their emotions.
I understand that they are indeed teenagers, and he is "confused" ... still (my point of view) he didn't put a limit at all, and if u want to see normal the part of betraying her trust by being a teenager as an excuse... well that's ur point of view and it's okay, but I think he's not a good bf with her at all.
And he admits that he sees (has / had) Nina in a sexual way in this last chapter...
I know you're are saying it's biological and that they're discovering their own feelings, but again, my point of view, it doesn't mean u can go and hurt the feelings of someone justo because You are discovering yourself.
And that's it, FOR ME, he's not a good bf
First of all I dont know HOW did you conclude Kazusa's INSECURITY into Izumi's BETRAYAL. I understand he should have spoken to Kazusa about it and he did not but understand how much of a taboo sex and sexuality in itself is considered to be in asian culture and I know because I am asian myself. Izumi never denied that he doesn't harbour sexual desire but does he harbour sexual desire SPECIFICALLY towards any character? No. He is old school and even to an extent I feel he is demisexual. That does not make him a bad boyfriend. He later on does realize that in his own confusion he made Kazusa insecure and did clear things up with her while being upfront. And part of Kazusa's insecurity was because she felt inferior to Nina. It is not an "excuse" that he is a teenager in a puberty, I understand that but you can't deny how UNCOMFORTABLE he was. Like heck even I felt uncomfortable with how nina acted and she constantly confused him, making him feel like him being uncomfortable was a part of him being a "man" and is his "sexual desire" towards her when in truth it was not.
Ok, maybe I don't get it because it's in fact a totally different culture and I don't know to what extend it's a taboo.
So, let me tell why do I conclude Kazusa's insecurity into her bf's betrayal, and u just said it: Because he didn't talk to her and not necesarilly about sexual stuff, just about ALL and he knew Kazusa was feeling insecure and even though he was so unconformotable with Nina's aprochement, he didn't stop her at all... that's the way I see it. And of course, maybe is not just sexual stuff that's so hard to talk about, but their feelings too... but as for myself... I think u make an effort to at least say: "You know what? I don't know what kind of feelings are these and I'm sorry if I'm hurting you with my confusion"
And once again, in this last chapter HE ADMIT to have sexual desires towards Nina... and yeah, I know Kazusa said that she also has those sexual desires towards her, but that's where I go, I feel that declaration was just because she was feeling inferior...
Let me ask You just one thing, wether it's a taboo or not... will you be ok if your lover tells you: "I have sexual desires towards your friend but I don't love them"? Will you say just as you're saying know?, Like: "It's ok, it's just a biological respond"?
If you were to be ok with that, then it's no use You continue explaining it to me because that's the way I see their actions and it Will be difficult (if not impossible) to agree with that :/
Idk what yall are on seriously. They are fucking teenagers for godsakes and the whole point of this book was to confront about the topic of sex and love. Neither Nina or Izumi are at fault here. Everyone shitting on izumi don't see the fact that 1) it wasn't his choice to touch Nina's ass and 2) It was heavily mentioned in the beginning that Izumi is very old school type of person and wants to cherish the one he loves. Him getting aroused was a biological response and it was stirred up more after what Nina said and he went into a guilt trip. Nina on the other hand doesn't sexually or romantically loves Izumi, it was just that she was Challenged. Everyone only saw her for her looks since she was a kid and Izumi was the only who just didn't see her for her looks, that felt different for her and that basically challeneged her perception about people that is why she is so desperate and it is very understandable considering how everyone was just about her looks and judged her and how much she hated it.