
It's "Tiger's Wdding Day"
First of all don't read the comments just read the story. A lot of immature young people are reading the story and calling the MC a cheater when that's not what really happend (he got ghosted for 4 months with 0 contact from his bf and at that point any normal person would think that the relationship is over, like his bf suddenly just vanished with no contact, MC didn't even know if he was alive or not) and prasing the ex-bf/1st lead when he even turned obsessive at one point.
All I ask is to read it and then form your own opinion on the story without letting the comments influence you.
Pls god for once I want the 2nd lead to win (literally read only 1 manhwa where the 2nd lead won over the original boyfriend)