The story might be like this, girl A likes guy A. But the girl knew that guy A likes his friend which is guy B. Guy B didnt know that guy A likes him until one day, guy A told guy B that he loves him after girl A forced guy A to confess to guy B. Guy B rejected him because he just think guy A as one of his bestfriend. Guy A feels so frustrated and at the same time, girl A confess to him. But he rejected her because he can't loves anyone else if that person is not guy B. But they stayed as a friend after that.

Later, guy B seems to start likng guy A. He started to blush or shy whenever he with guy A. Guy A realize that and he was so happy. He told girl A about that and girl A feels so jealous without guy A knowing it. After that, Guy B suddenly confess to guy A and they become couple.

It is not end yet, guy A told about that to girl A and feels so frustrated because she still loves guy A. She didnt want to see guy A and guy B being together. So she plans many things to ruin them like making guy B jealous when guy A with her or provoke guy A about guy B or something like that. Guy A always spends his time with girl A and guy B feels jealous but he didnt tell him.

Until one day, guy B saw guy A kissing with girl A (which girl A who's the one that kissed guy A) guy B feels so disappointed and he asked guy A to break up with him because he was so tired with all the things happened and he thinks that the person guy A loves now is not him. Guy A really shocked with all of that. Guy A feels so down and girl B tried to comfort him but he rejected her. Guy A really loves guy B so he feels so sad knowing their relationship ended. At school, guy B seems to act likes normal(but inside,he feels so sad too) while guy A not.

A few days later, there's a news that guy B couple with girl B (only rumours).guy A feels so frustrated until the point that he raped guy B so that guy B could never live without him. At that time, guy A told guy B that the one his love is only guy B and he cant live without guy B. And then, they become together back because they still love each other. At last, girl A gives up and pray for their happiness.

-too long right, sorry. Hope you guys can suggest any manga like this. They must be school life genre -

Are you looking for a title of a certain manga, or do you want us to suggest a manga similar to that long description? Because that might be a little difficult, since it's too specific.

Manga that has a plot almost like this also might be okay. What i want you guys to suggest are the manga that have unrequited love at first then whey they couple, they have triangle love like this. The third person must be a girl and must be the bad one who ruin the relationship. I also want school life genre.

I know of a manga that seems quite similar to this but has changes such as girl A confesses but leaves guy A alone. There's no girl B, and it's not yaoi. I have not run into a manga like this before so sorry if I'm of no help.

The manga is called Kare no Aijou no Hakari btw.

Thanks for the suggestion. More?

Stuff with 'evil' female love interests:

Kimi no Mukougawa Though the girl may come across as a supreme b*tch at the start and cause tonnes of soul-crushing angst that makes you just want to slam your face onto the wall repeatedly... Don't let that deter since : )
Let Dai
Mister Mermaid warning: downer ending

Koi ga Bokura wo Yurusu Hani 2 girls, I believe.

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Simply another normal human being...

Oh god! I really like that kare no aijou no hakari and koi ga bokura wo yusuru hani manga. Thanks for suggested that manga for me. Please suggest me more manga like that!