
Spoiler..........So for those who are confused. Sejin was treated really bad in the past life cuz he stole something from ido for his father. And ido not knowing any better assumed Sejin chose his family over ido. Feeling betrayed N all he mistreated ido, did non con sex and the list goes on. Sejin didn't even have a nice room to live in when he stayed with ido in the past life. One day he was sick and ido's brother happen to be home cuz ido said he prepared a gift for the brother. The brother saw Sejin and thought it was the gift ido prepared for him so he raped Sejin and then Later when ido gets home he misunderstands everything and also rapes Sejin. Sejin at this point is completely broken beyond and after finding out he's pregnant he shoots himself with the pistol in ido's study. Ido realises his mistakes too late and dies(??) not too long after. Then the second timeline begins.

Spoilers- I finished reading the novel yesterday!
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All the dreams and memories Jung Sejin has of being raped are all from his past life. Kwon Yido raped him once when he was in his rut and the rest of times they did it can be considered as dub con, Sejin was always in heat and the sex was rough, even bleeding from not preparing the first time and even if he Kwon Yido did better the other times he talked very dirty and did no aftercare. Other memories are of angry and disappointed Kwon Yido asking him to blow him for stealing documents (Jung Sejin stole them in his other life as he was not that close to him and after they did got close he did not confess he stole them, making him even angrier). He was raped by Kwon Yijun once too, that's why he was scared of him now and was super passive about following what he was saying. In this timeline Kwon Yido is trying to do better, as much as he can, he has photographic memory so he remembers dates and other things very well and tried to avoid all the things that happened in their past lives.
ok so sejin was rapped by ido and brother???? im so confuse why???!! somebody please give me answers