
SPOILER!!!
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MC and ML were originally married to eachother and MC committed suicide. After he did that, time turned back to before MC and ML first met. ML fully remembers everything from before time got turned back and he wants MC to live a happy life now BC he deeply loves MC, ML used to be an abusive husband in their "1st life" so he pushed MC away now thinking it was his fault/he doesn't deserve MC

It's secondhand knowledge. A bunch of people who read the novel with manhwa is based on have posted a detailed summary of the entire novel in the comments when this manhwa was around 20-ish chapters and so far it has kept following those summaris/spoilers to a T.
I've never read the novel myself tho.
CAN SOMEONE TELL ME WHAT THE PLOT TWIST IS ?! some people already made some suggestions/ implications about the Mc (something like he killed himself) which doesn’t make sense too me, I would like for someone to share their theory (: