
I think it’s this one http://www.mangago.zone/read-manga/it_s_a_sunny_day_again/

I reas this manga.
Where the boyfriend thinks he cheated on his girlfriend with his work colleagues (new to the workplace) then due to misunderstanding the girlfriend tells him she slept with someone as well. Then the colleagues tells him they never slept together.
The girlfriend has long hair and she uses round glasses, she use shorts and big t shirt while indoors.
Not so sure about the guys but he is tall and are always nice to his work colleagues.
He once saw the colleagues that he thought he had slept with crying (before everything happened). He consoled her gave her a lighter.
The colleagues I think she has purple hair. She acts all sweet, she smokes and is younger than both of them.
Hello everyone, I am looking for a manga.
At the beginning of the story, uke has a girlfriend were she cheats on him with a boy (who would become the uke's future seme) the thing is that uke finds out from his friends who saw her gf cheating so they break up. Then the uke meets the seme at work, he found out that the seme frequented that club and was famous with the girls so he plans for revenge. He started sleeping with the girls that seme flirts but uke was very nice to them because after all he still wanted a relationship, however they did not end up choosing him. The seme finds out about the uke's plan so he started flirting with the boy and the uke had to sleep with the boy. It is a manga but I forgot the tittle so I am looking for it.