Could it be this? http://www.mangago.zone/read-manga/totally_captivated/
You've read it > 20 times but you can't remember!?!? Σ( ￣□￣||) If I were that manga, I would be sure pout. ┑(￣▽￣)┍
It was a year and a half ago, you know. Since I last read it. I've been too busy to read it, unfortunately. #－.－)
Yes, thank you very much. I can't believe I forgot that name, even though I was totally captivated by it. ;)
You know.. I'm just joking.
I can't remember it for the life of me, for some reason, even though I've read it more than twenty times. I guess that's what happens when you haven't read it for a year and a half or so... (〜￣△￣)〜
Anyway, it's about this playboy that cheats on his boyfriend one too many times and the boyfriend breaks up with him. He then goes and gets a powerful yakuza(?) boyfriend, to make the playboy feel jealous. That doesn't turn out too well, because the yakuza boss guy starts to like the playboy, and because the playboy loved his ex, he didn't want to ruin his ex's happiness by cheating with the new boyfriend. A lot of other things happen to cause them problems, but in the end they are both in love with each other.
I will say thanks in advance, because everyone has been so helpful each time I needed some extra eyes for finding my favorites in manga and manhwas.
Thank you guys so much for your help! <3