Alrighty, lemme break this down for you as a psych student who focuses on sexuality and LGBT issues.
What happened here is that Nii-chan was abused, okay? Now, he was born gay (because that's how that shit works), but he was also abused. He also didn't realize it, as some children don't (I mean I didn't figure out my abuse until like high school). His parents, being homophobic assholes, were like "YOU WERE MADE GAY BECAUSE HE RAPED YOU!" Since Nii-chan had no support at home (he was exposed to "reparative therapy" which is considered glorified torture and is illegal in many places. look up some stories for the details bc it is horrifying), he didn't get to deal with the issues that come with being sexually abused. Eventually, he came to the conclusion that being gay and being a pedophile were the same thing (no) and that all male-on-male relationships involved one person dominating the other (also no). This could have been avoided if his parents made the distinction between pedophilia and being gay, but they were dicks so they didn't. Anyway, Nii-chan saw Yui as a kid and saw himself. As is common with victims of abuse, especially those who don't actually get support, he restarted the cycle. He reenacted his abuse with Yui. This fucks Yui up, too, but he keeps his sexuality under wraps so he doesn't end up exactly like Nii-chan. When Yui meets Nii-chan again, he is still interpreting their relationship as "love" (it's complicated), and, as Yui learns more about Nii-chan, he starts to put together what happened. Nii-chan is so angry because he never really got to accept himself as gay; his entire life his parents equated that to the abuse he endured. He doesn't know how to have a healthy relationship because the only male-on-male relationship he knows of was sexual abuse. He also has internalized his homophobia, which is why he tries to avoid being the bottom during sex. Yui forces this on him (which is of itself morally dubious, but we'll ignore that for now) so that Yui can attempt to force Nii-chan to accept his sexuality as not being the result of abuse, and maybe start leading them both towards a healthier relationship. Fast forward to their reuniting. In that scene where Nii-chan is so scared of kissing Yui in public (internalized homophobia + aversion "therapy" + sexual abuse = someone who is probably not comfortable with their sexuality), it becomes obvious what the problem was: Nii-chan was gay, and, like I mentioned before, was also so fucked up that he reenacted his abuse with Yui. He was legitimately scared. Now, this doesn't excuse his actions. Child sexual abuse is a serious topic, as I know firsthand. This is just a sort of explanation of what was going on.
i think you explained it really well.
Okay, I have to say this, because I'm annoyed about it. They aren't Italian; they're Sicilian! SICILIAN! Cosa Nostra (lit. "this little thing of ours") is the Sicilian name for the mafia. Omertà is Sicilian as well. Mixing those two up pisses me off to no end, probably because I'm Sicilian (and technically descended from a mob family but that's not important).
I want there to be a happy ending, but I have no idea how one can happen... Also, what the actual fuck?
Oh man, I'm actually a gay dude (well pansexual) and lemme tell you I appreciate this manga becAUSE THIS IS ACTUALLY REALISTIC? Man I want me relationship like this. ╥﹏╥
...I have a phobia of bees so chapter 6 was a bit...
When I got to this page http://www.mangago.me/read-manga/kimi_to_no_dogfight/uu/413a8480d51ceaaf0d0279ff276d54d8_chapter-2/pg-18/ I literally had to stop reading because I was like jeSUS FUCK HE'S PRETTY
hahaaaha but yes, he is!
Good on Shou for getting out of a very abusive relationship. Now go date someone who isn't so... dangerous. Like Kazu. Kazu seems normal.
You know goddamn well that they’ll end up together hehe that’s Harada sensei for you
I know, but a man can dream, can't he? Maybe this will end up like Azami, with Fuku realizing that being abusive doesn't work out in his favor.