Doutei ni Ai Nante Sakebenai!
Complete | Yamada Papiko | 2000 released
I love the drama in this manga. Hayato is a asshole for having a secret relationship with his big brother's boyfriend. I hate him so much. Hayato being young doesn't justify what he did and people shouldn't put all the blame onto the cheater, Both of them are equally to blame for what they did. Hayato knew what he was doing was wrong but he didn't give a damn. Teenagers aren't dumb so stop excusing what Hayato did. Hayato was like 15-16 and the cheater was like 17-18. (I think the affair was going on for 2 yrs.) So the age gap isn't so big, people are acting like Hayato was 11-12 when he was dating his big brother's boyfriend. Middle school ages are different in Japan.
Musubenai Necktie