Hello.
So I recently read this manga, but I totally forgot the name of it.
Basically this guy has a wife and the wife married him because during their college years, he was number one in class, and she thought he would become super rich and get a CEO kind of job. The guy doesn't and keeps contemplating suicide and his boss is really mean to him and treats him like dirt. His boss has actually been in love with the guy's wife since college, and he reallly wants to marry her too. Anyway, so the guy meets a young girl who works at a "look and touch" sex job that forbids actual sexual penetration and they sorta fall in love. The guy's wife divorces him and decides to marry his boss. Things go downhill for the boss and uphill for the guy.
That's all I remember happening--I don't think I finished it the manga.

All I remember is that the title had some numbers and it might have said "loser" something--but I'm not too entirely sure.

Thanks a lot!

Edit: Oh yeah, the manga is in color!

Possibly Loser (Team 201)? I have not read it myself but it seems to fit your description.

Yup that's the manga! Thanks a lot 😀