
MAIN SPOILERS from first life :
so the ml was an absolute shit husband in their first life after Sejin handed the documents over to his dad (which he did because he was scared to be abandoned).
ML continued to ignore Sejin to the point where he begged the ml one night that he would do anything just so he could forgive him and have a better relationship (this was at the point where Sejin had no one, and no family to rely on). The ml who was drunk, (not excusable) told him to kneel and forced Sejin to give him a blowjob to the point where his throat swelled and he couldn’t eat the next few days. After that Sejin gave up trying to seek his attention and was wasting away at the house.
One day ml’s brother randomly came over to the house and found Sejin to be in heat, he horrifically assaulted him and told Sejin that he was a ‘gift’ given to him by his brother. This completely broke Sejin’s heart.
Sejin had help to run away from the house and heal at his old apartment, he was there for 2 days. ML finally found him to then see the state of him and demanded to know what happened. Sejin said that he had “sex” with his brother, just like the ml wanted and he would do it again if ml also wanted.
This angered him to the point where the ml r*ped him almost exactly the same way as his brother. He also imprinted on him by biting his neck (in this story I think you can gain memories and emotions from the other person). After one-sidedly imprinting him, Sejin found himself back at ml’s house basically imprisoned with a bodyguard following him.
The ml never showed himself (only when Sejin was pretending to sleep he would talk to his body).
Sejin would usually starve so a doctor would come over and give him IV. He was extremely depressed, and lonely. He had no where to go.
A couple of months pass I believe and he hasn’t gotten any heats, the doctor told him he was pregnant and would have to take better care of his health.
This obviously was not what Sejin wanted as firstly he didn’t know who was the father, and secondly he doesn’t want to give birth an heir of the family.
He walked to the study at night and found the gun mounted to a wall, he sat at the desk and pointed the gun to his chest where it hurt the most.
ML arrived at this time to see this and begged Sejin not to, Sejin was finally happy to see the ml one last time and shot himself. He ended up dying in ML’s arms.

Daaaammmnnnn!!!! Like boy was it bad alright. Just wait for the artist of this manhwa to dedicate a whole season of the first life. I bet everyone is going to be crying and wanting to go back to the present. But we will be stuck with the first life for a whole freakin' season. I seen stuff like this happen a lot... Σ(っ°Д °;)っ

After reading this spoiler imma let this marinate until it's completed because first life is just crimes against the poor mc. If I were in Mc's place in the present and got my memories back I'd never be with ML, sure he has done things to change but only when he literally killed mc with his own hands.
just read the novel, and yeah there is no redeeming from that imo.