Background of Ido and Sejin's past [SPOILER]

[SPOILER]: Don't scroll down if u don't wanna read.
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Imma just put what I remember.
So mc and ml both regressed but mc didn't remember his past and ml got his memories intact which I think it's because ML is still imprinted on MC while MC isn't.

the flashback of memories occured when ml imprinted himself to mc then mc fainted then his memories came flooding in.

So Sejin is abused, used and neglected by his adopted family because he is a defective omega. While people who kidnapped him sold him. On his birthday Sejin was informed that he is arranged to marry someone but they didn't say who. So on the wedding day he met Ido who was rude saying comments like "thank God at least the face is easy to look at, although that isn't even that great"

But their marriage went smoothly and Sejin moved to Ido's house but Ido is cold and doesn't want Sejin to do small wife duties like waiting for him or greeting him when he comes home.

Ido has this toxic principle that if someone does something good for him they expect something in return, that's why he is cold to Sejin.

Even with Sejin's heat Ido thought that Sejin is using his heat to exploit on him and told him things like Sejin is selling his body and only cheap people will buy it something like that, and since Sejin is a defect no inhibitor work on him but Ido ordered people to inject him inhibitor so Sejin vomited through out his heat cycle.

While Haesin is using Sejin asking him to steal a document from Ido. Then gaslighting him that it's up to Sejin if he wants to do it or not but throws comments like "Haesin is the only place you can return to" and they even told him that his marriage with Ido won't last long so Haesin is the only place he can return to.

So Sejin who is deep inside just doesn't want to be abandoned stole the document. And Haesin also put the blame on tax evasion on Sejin too. Sejin was prisoned then Ido bailed him out.

Tho as time goes by Ido and Sejin actually fell in love to each other, spending time together they fell in love to each other. Ido fell cause Sejin isn't the type of person who expect anything from him. And they had cute moments together

So Sejin was getting guilty cause he stole that document and eventually he told Ido about it and Ido felt betrayed he started to become an asshole again but since he liked Sejin he never actually had the strength to divorce him so he just abused Sejin.

Then on the funeral of Ido's grandfather, Ido's brother who is looking at Sejin with dirty eyes on their wedding day, came to Ido's house. Then he saw Sejin he raped Sejin and Sejin put up a fight but then young brother said " so this is the gift Ido was talking about" then Sejin stopped fighting after hearing that comment. And the asshole even knotted on him. Sejin immediately called Mr. Kim and said "please help me"

Sejin and Mr. Kim packed all of Sejin's stuff and drove him to his officitel, Sejin had a high fever then 2days later Ido came to Sejin's place. They had a fight cause Sejin was angry cause Ido "gifted" him to the brother and he said they should divorce. Ido got mad saying Sejin doesn't have the right to decide that. Then Sejin was like what do you want then, I can let your brother rape me as long as you like (well something like that)

And Ido got mad, in which he raped Sejin and he marked and knotted Sejin. Sejin fainted then he woke up in Ido's house. He was just lifeless after that. Ido then never appeared to him and a bodyguard was assigned to follow him everywhere.

Ido tho at night he visits Sejin when he is sleeping then saying stuff like "Sejin what should I do" (yeah Ido was doing is I regret it ritual on Sejin every night) but Sejin has Insomia so every night he just listened to Ido.
Then days later Sejin's doctor told him he is preggo.
Sejin then can't believe it and was thinking who's child is it? since both the asshole brother and Ido knotted him.

So Sejin who felt that he has no place to go he even got pregnant out from rape. He went to Ido's study room and grab the gun that was displayed in Ido's room. He knows there is ammunition inside he put it in his chest. Then Ido came to his study and saw Sejin killed himself with a gun. His last words were "take care, Kwon Ido"

-------------------[FURTHER SPOILER]

The actual gift Ido was referring to was a document about his brother who frequently sexually assault people. It's kinda a evidence cause Ido and his sister was getting the asshole behind bars.

The child Sejin was carrying is his and Ido's child.

The reason Ido agreed to married Sejin is because he wanted to steal Haesin corp.

The document Sejin gave to his father is a incomplete document and it was just basically useless, Sejin knew that and Ido found out about it that's why he kept doing "I regret it" ritual on Sejin every night

If you're asking about Sejin's brother. He loves Sejin in a romantic way, Sejin knew about it cause he saw his brother masturbate saying his name