ML would be from a special bloodline who will be good at cultivation. So he is raised like a dog by his master and constantly brainwashed and made to think he is a tool to protect their sect and the world.

After a major fight, the ML would have lost his memories and been thrown to the mortal world. He meets the FL and she rescues him and names him "Xie Lanshun", after 1 year they fall in love and marry. After 2 years he gets all his memories back. Memories of 1000s of years. His 3 years of memories and feelings with her gets suppressed by all this and before he is able to think about it peacefully, he decides to leave her. This was his mistake. He should have taken sometime to sort it out.

He never accepts the Xie Lanshun as himself, he always thinks it as an alternate memory he has and will want to forget about it. But as each day goes that feeling starts growing and finally it goes completely out of control. Humans want to be happy, so obviously subconsciously he will want to be happy and do this he has to accept his love for her. This battle keeps on going in his mind.

His sea of consciousness will split into 2, one which wants to love her and the other where he wants to let her go. this causes him to lose a lot of his powers and he will be become unable to use his sword intent and it goes out of control and would also be stabbing him 1000s of times a day. He lives like this for many years. But no matter how he feels he always tries helping the FL and making her life easier. Its really sad to see him suffer so much.

FL and ML fall apart.

FL goes to another small sect where original ML and FL are. She also had a contract with a demon dog and a fox. Both are really nice. The sect master will also be a very powerful person who would have lost of a lot of his cultivation. Its nice to see that they dont get stronger at once. Its step by step. FL is also able to completely let go of her feelings because she gets the red line between them cut by a spirit. Although she has memories it doesnt bring her pain anymore. And to connect this back, the ML would would need to die again.

The MLs feelings goes completely hay wire. details in spoilers above. ML helping her behind the scenes.

The FL dies protecting a disciple and ML goes bat sh*t crazy and finally accepts his feelings for her and abandons the cultivation world.

50 years later, her master would have given her something which would have made her soul to grow up as a tree and not die. So they all try to resurrect her. It was really sad to see ML hurt so much and I also felt bad that the FL dint show any emotions towards him, But the red line would have got cut so its not her fault either.

FL resurrects, ML dies trying saving her disciples. FL gets all her loving emotions back after this as the red line gets connected again.

In the extras, after 100 years, she finds him again (his reincarnation) and they get back together. He also gets back all his memories and he proposes to her and she accepts.

The ML makes a series of unforgivable selfish mistakes (hes still a hero) and the MC has to live her life and repeatedly rise above them. She starts cultivating in a ruined sect on the verge of colapse, grows stronger, becomes a leader, and never stops loving and caring for everyone around her. Her ex-husband, the ml, casts her out of his cultivation sect because he cant aknowledge her being strong enough to join the world of cultivation and thinks she will hinder him (backstory trauma blah blah blah), threatens to destroy her cultivation should he find her practicing (a lie to hurt her and make her give up), and repeatedly lets her down by being unable to fulfill his promises to her and refusing to aknowledge his own feelings (putting his sect and trauma before her). The best things he actually does for her are done in secret. The MC recognizes his extreme selfishness and chooses to cut off her love for him and see him for what he is. The MC is very practical and an overall great character. The ML is doing a regret and chase your wife to the crematorium story all on his own. I almost wish the MC was allowed to actually move on and have a relationship with someone else after her first husband. By the end it almost feels inevitable that its the MCs job to make sure this selfish yandere doesnt hurt anyone by sacrificing her limitless patience to occupy his obsession

The ultimate death of the ML (the heroic sacrifice [hes pretty suicidal for her love at this point]) feels more peaceful than anything else. The MC spent so many years mourning her husbands "death" (abandonment and betrayal). it finally feels like she might be able to do what he suggested at the very begining... move on because a few years of time are nothing but a drop in the ocean to an imortal cultivator. She regains the severed love string, remembers all her love, and is finally able to cry out her pain at his death

100yrs pass and the MC has truely moved on and smoothed out all the emotions of the main story. Did you think the ML was gone? nope! at this point there are something like 3 versions of the ML. ML1.0 (the thousand year old imortal sect leader with stunted emotions), ML2.0 (the MCs short lived mortal husband who really loved her and was absorbed by ML1.0), and the brand new ML3.0! This new version is a reincarnation who is born a mortal, meets the MC and starts his journey to become a cultivator because he is instantly struck by her beauty. When the MC meets him, they start dating so fast everyone is screaming "GIRL YOU FOUND A LOOKALIKE REPLACEMENT??!!" and she super 100% did. Even ML3.0 thinks hes the replacement. Their relationship progresses really fast and I wish it didnt because he seems so sweet & likeable. I wish he got to be a character. Unfortunately, he regains his memory real fast and becomes what I would say is predominantly ML2.0 with the memory and crazy of ML1.0. Justice for ML3.0!! The MC deserved to not babysit the selfish yandere hero her whole imortal life. Even if ML3.0 was the reincarnation, I really wish he looked different and never regained his past lifes memory because he was really disdainful of 2.0 and 1.0s mistakes. Author gave him a clean slate and some healthy mentality only to take it away

He's hated far more than he deserved in my opinion. Yes he did abandon her but can we blame him? For thousand years he has been brainwashed to think, live and bleed for the sect, so of course when he remembers he abandoned her and of course the first time she came to take him back, she will face a wall.

Should someone who has learn to be selfless and manipulated to follow the sect accepts easily a "happily even after" with a mortal woman he knew for only three years just after getting his memory back (against a thousand years memory?) ?

And that's when I felt she's a bit unforgiving, I still love her but she denied his feeling easily, talk about killing him easily and cut her feelings easily. She said he doesn't know how to love so his love is worthless? She's like a flame burning strongly and estangishing quickly while he's the opposite, burning slowly until nothing can be repressed.

I felt sad for him a lot, not only because of her but also others. We can read about him destroying himself to protect others, keeping away from her as to respect her will and happiness but only his death can truly be enough to deserve the "world forgiveness". Really? He literally protect everyone (and like he did hundreds of times) and ask for nothing but to protect her girl and when it didn't happen, he got furious, kind of normal right? But they say he was mad, a traitor and no compassion at all (literally nobody on his side). I was really in shock at that time... And I won't accuse our FL because sadly she cut her feelings for him so she's the only one whose reaction is logical.

That's was when I thought let's this world burns haha~