That's a tough one... They usually end with the pairing getting back together again. I'd love to read a story where the other leaves them and moves on with someone else.
maybe these...??
http://www.mangago.zone/read-manga/hina_wa_mitsuiro_no_koi_ni_torawareru/
http://www.mangago.zone/read-manga/almond_o_nanatsubu/
http://www.mangago.zone/read-manga/tied_up_in_twins/?av=2
In this one is a story like that. But since there are lot love problems and misnderstandings going on, it takes a while to get to the break up point. The seme who is being left, isn't a main character but you discover him cheating pretty fast if I remember correctly.But like I said, the final Break-Up is taking a while.
THANK YOU GUYS
MORE PLEASE HAAHHA
YES MOST OF THEM END UP TOGETHER IN THE END
omg! I'm about to recommend this hahahaha only manga that has a lot of tear-jerking scenes. I read this one in a raw version on fb and even though I didn't understand the dialogue the drawings were enough for me to cry hahaha. unique and highly recommended
ai ga matteru
seme doesn't cheat but it follows the same concept i think, and this honestly a true gem:
http://www.mangago.zone/read-manga/life_senjou_no_bokura/
He didn’t cheat but he dump uke and go off to marry another woman.
Yes, but they got back together again. It doesn't seem to be what OP's looking for.
He really wish the uke had found a man who is proud to be his and accepting their gay relationship proudly. No where in here did the author make the seme reflect on his actions and regret his decision.
I
If you read my first post and OP's reply, they seemed to be insinuating a story where the cheating seme doesn't get together with the uke. Look. That story might be good but it has nothing to do with the request. There's no cheating. Breaking up and getting together again has no relation at all.
Emphasis on "constantly cheats". The seme in Life Senjou no Bokura isn't the type of seme OP was lookin' for. And I'm not sure why you're even replying? I was AGREEING with you.
There are two manga you posted above. Is the the one started with Almond?
Oh, when I said my first post I meant I was saying how it's tough to find a story where the cheater seme doesn't get together with the uke and OP agreed that most of these types of stories typically end with the cheater getting back together with the lover.
"Scarlet "
"Hina wa mitsuiro no koi ni torawareru "
"Suki toiunoni nazekashira "
SEME WHO CONSTANTLY CHEATS AND EXPECTS THE UKE TO FORGIVE HIM BUT THE UKE HAD ENOUGH