I remembered someone posting a spoiler

[Spoilers]
- Ido tried to show his brother as a "gift" the documented proof of his nasty stuff. It failed horribly because that bastard found Sejin alone at the house, and ended up genuinely thinking Sejin was the gift.
- After this horrible experience, Sejin finally leaves Ido's house and goes back to his old apartment. Sadly, Ido's goes there's as well, finds out what his brother did and... Does the same thing to Sejin out of jealousy and psychopathic revenge. During this act of violence he bites him, and that's how he finds out the truth of eveeeerything that happened and takes Sejin back to the house.
-... Only to keep him basically insolated in his room, because hE dIn'T kN0w hOW T0 f4c3 HIm oMg (Ido is not only a bastard in the first timeline, but turns out he is also very pathetic lol)
- During this period, Sejin learns he is pregnant. As both acts of violence happened with very little days of difference, he has no idea who the father might be. Sadly, this triggers him and is his mental health is at a lowest point and has self destructive thoughts, so much that he ends up going to Ido's office inside the house, grabs the gun, Ido arrives, and Sejin decides to off himself right there in front of Ido after saying goodbye to him.
- Haeshin fails, Sejin's "father" goes to jail, Ido's brothe finally falls, etc. and Ido decides to "follow" Sejin in death... And then he wakes up in the present timeline, around 10 months before the events of the first chapter. At first tkhe can't believe what's happening until he realizes that It was not a dream... But a second chance to fix everything he did to Sejin, save his life, and after doing that, go to hell and die (literally, that eas the plan).
-After Sejin get his past life's memorires back, he doesn't want to have anything to do with Ido. But, as they are connected, he still can feels everything Ido is feeling, wich kinda leaves him with complicated feelings. At some point, Ido's company founds a campaign for Sejin's company and Ido starts going PERSONALLY to see Sejin basically everyday, bringing him whatever he thinks Sejin would like and exagerating a little (like, one time he heard Sejin telling his employees he likes desserts... And from the next day the while starts receiving desserts from fancy places Every.freaking.day)
OMG this is getting way tooong, I'll summarize from here lmao.
- Sejin stills has complicated feelings, but knows that he stills loves Ido; so he ends up telling him that of he keeps going with his plan (including the "final touch") It would only change the order of their deaths... Because Sejin would follow him shortly after if he commits s**c**e. Lots of crying, some sex here and there, Ido is very eager to go down there with his mouth, let him grab him by the hair and basically become Sejin's plaything if he wants to (this is supposed to show us how mucho Ido changed even in the sexual area lmao). but now they start again, as a couple. End.
- Aaaaand then we revisit the first timeline but from Ido's pov ╮(￣▽￣)╭

thanks you for this! we love long spoilers <<33

Thank you so much saves me from the heartaches