Well uhh suyeon cheats on yoonho, why? Cuz suyeon back then thinks of yoonho as a replacement for gyeol, gyeol was the one who made him a masochist and shaping him into the twisted person that he is, suyeon was attached to gyeol cz of how suyeon thinks that they are somewhat "similar"(and also gyeol reminded suyeon of his father in sense of cruelty) later when yoonho found out nd stuff happened, they did a 3some which left yoonho heartbroken nd they break up, suyeon was then imprisoned inside gyeol's house nd they fuh n stuff till gyeol found the letters suyeon wrote, they argued, gyeol forcibly made suyeon drink a whole bottle of wine(also forcing himself onto suyeon) nd when suyeon was drunk he ended up imagining gyeol as his dad and he called him dad which leads to gyeol breaking suyeon's arm, gyeol said they need to go to the hospital(he wasn't panicking), suyeon cuts his wrist, on the way to the hospital they talk then part ways, later suyeon went to yoonho's exhibition w/flowers nd a letter, a confrontation happens then they part ways, later yoonho reached out, saying he wanted suyeon's help on a project, suyeon agreed and the rest is suyeon helping yoonho whilst also building their relationship, later after yoonho's graduation suyeon confessed sayin if yoonho could give him a second chance nd yoonho accepted, they spend the night tgt and had a happy ending(which they totally deserved)
I'm sorry if sum parts don't make sense I was trying to explain it in the most simplest way possible
Technically it's suyeon being caught up with his past and him having attachment issues whilst thinking he doesn't deserve to be loved and how he also don't know how to love made him cheat on yoonho. In the end of the day, everything leads back to suyeon's father
I just finished reading it…
Fucker didn’t even suffer…
I also hated that MC kept the tattoos and the marks…
I understand it was his waynto be reminded of his mistakes…
But it just feels like Suyeon never truly moved on.
And that bitch ass Gyeol is having the time of his life…
Fucking hell…
What a disappointment this has been

GUYS PLEASE SONEONE ANSWER ME WHO CHEATS ON WHO LIKE SPOIL ME ON EVERYTHING PLS