
I read up to 70-80℅ of the novel but gave up because I can't forced myself to keep reading. So my review is very unmotivating for you. But this novel is very hit so you might read it.
TW : Rape in by seme to uke in 1st life.
Both lives uke is premium tsundere (in case you can't tolerate tsundere). Seme is totally reformed in 2nd life. POV from seme.

Lol. Here's your big spoiler to the point of last read.
Basically sizhun (uke) is very pretty. Moran (MC/seme), fell in love with his beauty. So when he joined the sect, he asked his uncle so sizhun could be his teacher. Sizhun only had 2 students (shiomei??? /anyway it's moran love interest at that time), and the other student is moran's cousin.
Moran basically orphan and he never met someone so beautiful so he stole his aunt's white flower, which turned out, it was very very precious. Moran wanted to give it to sizhun since it's same color and also pretty. But shizun, didn't wanted to listen to moran Explaination (moran really didn't know the flower was precious), sizhun punished moran with very harsh punishment (I think it was whipping). Small Moran was so sad because someone he admired was so cruel to him, then came shiaomei, he visited Moran with dumpling. Moran finally saw shiaomei as his white moonlight. He fell in love with him because of his kindness at that time. From that point on, for whatever reasons, Shizun always cold to Moran and kept punishing him.
Long story short, the shield/barrier that Shizun build is crumbling and demons started invading. While guarding and mending the shield, shiaomei was fallen, Moran asked his sizhun to save Shiomei but Shizun never listen to Moran nor gave him explanation why he couldn't save Shiomei. Shiomei died and finally Moran turned darker side. He thought the world was unfair. Moran was blinded by hatred he couldn't even see his uncle and aunt actually love him. He raised to be like the emperor of all cultivators. At one point, he took a wife (woman) who has similar face to shiomei, but he couldn't love her. So Moran kidnapped Shizun to tortured him. Shizun finally understand why Moran hated him so much so he "atoned" his sins by becoming Moran prisoner. At some point, Moran made him his concubine. They slept together, because Moran thought, Shizun who is abstinence immortal, will br very humiliated by this act. Oh before Moran became emperor, he killed his uncle and aunt and literally bucther everyone.
Later, the other sects tried to attack Moran. His cousin asked moran to give back shizun. I kinda forgot but I think Shizun actually came to battlefield and stay at Moran side but injured. The empress jealous of shizun. So when Moran wasn't around he made shizun kneel in the snow. Injured shizun later died. Moran was furious so he killed his empress by frying her. He later immortalized shizun body and kept it beside him for 5 years. Until chapter 1 of the story, which his cousin came to pick up shizun (he didn't know shizun died). Moran who lost his motivation killed himself, and 2nd life began.
In 2nd life, his only goal was to kept shiomei alive.
Moran who has new hope, no longer hate shizun. Little by little it was told in the story that, shizun actually loved moran. Which is why I decided to stop reading. In the novel, shizun is an elder (even tho he looked young), but Moran was a baby. He was 15. Shizun was ashamed of his own feeling which is very new to him, so everytime Moran came close, he became cold. And he punished Moran for even minor mistake. But new Moran is playful, so he just went along and didn't hate shizun. Even the dumpling shiomei gave moran, actually shizun who made it. But he was so shy so he asked shiomei to gave it to Moran. Shizun character is very tsundere. Because moran doesn't want shiomei to die, he is very protective of him, causing shizun to be all jealous.
There's a lot of adventurous arc that actually telling Moran, shizun is his soulmate. Even Moran weapon is a couple with shizun. But Moran is dumb so he can't figured it out. Moreover he was very guilty about what he did to shizun in past life, so he never thought shizun in inappropriate way.
Later, shizun will die while shiomei is alive, so Moran went to underworld to retrieve shizun soul. Time skip to 5 years later. Moran already an adult, and shiomei actually grown tall and big. And moran no longer love him, but only see him as felow student. When shizun awake from his death, everything was changed. I think the last thing I read was Moran and shizun bathed together and shizun started to remember his past life.
Arc : there's so many arcs in the novel. So I can't write all of them but through them you'll realize how tsundere shizun is.
Can Someone give me a summary of 2ha,? i want some motivation to start it lol