All I can say is that, ML is suffering too. The memories that people here think was an advantage is more like a sharp shackle pinning him from the past and slicing through his flesh.
Spoiler below if you want to know why.
Well the ML means good this time. His intention is pure in this timeline. His goal is to make Sejin independent and get rid of all the people who made him suffer including himself. The guilt that the ML carried along with his love for the MC from the 1st timeline to the 2nd timeline will make you understand just how his trauma run deep to his core. He gave up wanting to be a family with Sejin long before he planned Sejin’s future without him. He said he never deserved to have Sejin. He fears of his love ruining Sejin again. In the second timeline ML will make sure that Sejin will be able to stand up on his own with no obstacles not people to hurt him. When things are settled, he will break off the engagement and will kill himself so Sejin can be truly free. Sejin will cling to Ido and there Ido will confess then they will share their second imprint. Sejin will share Ido’s memories because of the imprint and will get the memories of the 1st timeline. He will ask space from Ido and Ido will ask for three weeks. After the 3 weeks mark he plans to kill himself. Well it didn’t happen because Sejin realized it and Sejin wants to start over with Ido. They got together but even so, Ido was still constantly getting nightmares from the past memories.
i hate ml down to his core he’s honestly disgusting along with everyone else too so what if u went back in time n now u treat him good that doesn’t erase ur past n what u did to mc rn all it looks like to me is ml trying to relieve his past guilt like do u even a conscience buddy u literally abused him to the point of suicide its legit so unfair that mc doesn’t have his memories back too in their second life ofc he’s obviously gonna fall in love with ml n that just irks me bc the ml who pulled all that is so easily forgiven since mc conveniently doesn’t remember shit