Sooo, once MC and ML recognise their feelings, MC starts to lose control of the book that becomes like a diary with no protagonist so he loses his insight and can't see the futur anymore and MC's body parts disappear from time to time. MC becomes anxious and talks with Yaya (the system and also MC and ML's daughter with both of their DNA) to start to plan for his disappearance. He plans things for ML's birthday and makes a deal with ML's grandfather who wants to make them divorce (he agrees to divorce later if he lets him heal his body). And on the day of the villain's wedding day, villain (who is a bad old guy who killed his own grandson to take his identity, so no direct link with MC/ML) contacts him with his parents hostage for a deal (bc he wants to know how to purify crystals). To put it quickly, MC notices his body starting to fully disappear so he saves the parents and since he completely disappeared while pushing away the dad away from a furnace, everyone thinks he died falling there. ML doesn't think so and stays single for 15 years waiting for MC's soul to reappear in another body before dying (but MC doesn't know so).

Back to the real world, MC wakes up and cries because the idiot is afraid that ML would marry someone else after his 'death'. He tried to talk to his friend (the one who gave him the book) but that friend says transmigration is rubbish. He ends up being pretty depressed but joins his friends, some twins, somewhere (don't remember where but I think it's a bar). On the way there he meets a middle aged lady who feels familiar and who looks at him with affection. Anyway, there he meets two guys who are the lackeys of the son of the admiral. Apparently they hate each other but he doesn't remember why. Son of admiral has a headache, looks shocked when he sees MC and says Jinjin (MC's nickname in that world). You probably guessed it, that's ML. Later there's some angst because those kind of meetings repeat and MC is like 'I don't dare hope!!' ML keeps getting headaches and changing his attitude until one night he goes to MC and tells him it's me, Cangmo but I can't stay out for long and then he becomes again the rival who hates him. MC feels better but there's still some angst and jealousy over shenanigans and when MC is with his friends at an exhibition about the war that ended a year ago, he starts getting flashes and faints. When he wakes up, there are other memories in his head and ML is here like do you remember?? MC was jealous and angry because of something that happened before so he acts like doesn't know him AT ALL to see ML suffer. Joke's on him, ML is like no problem I can explain everything to you and then he says I'm your spouse lmao. MC is like what the hell and he's really shocked. So now I'm just gonna do a brief summary of everything that happened bc I'm tired:

MC and ML were actually like two MARRIED generals with a daughter (Yaya is real!!!!) during the war. But during the final battle, the enemy, who couldn't defeat them since their mental strength was 4S, used a machine to make them think they were enemies (such a petty revenge smh). Sooo they went back mentally to when they first met, when they were rivals in mecha school but the machine also increased their hatred/feelings of rivalry. In reality, after hanging out and fighting together, they became friends then lovers until what they were before that battle. ML's family tried many things to make them remember but nothing worked so they sent them back to school (I think to try to replicate what happened before) and they also said that Yaya was ML's sister because ML acted disgusted when she called him dad. -> that is actually the reason why Yaya calls him s*um Dad in the world they were before lol

Since that didn't work, they put them in a virtual/holographic world via a cabin (MC was actually drugged by the friend who acted like transmigration was bullsht to put him there without suspicion lmao that hypocrite). There, they also put Yaya because she really missed her dads knowing that she would lose her memories at first but gain them back with time (that's actually pretty irresponsible now that I think about it lmao). ML's parents also entered - as MC's parents!!! They also lost their memories and regained them after MC's 'death' and just traveled the virtual world during the last years lmaoo they apparently couldn't say anything to ML for fear it would trigger a reaction because the truth may trigger what the enemies' thing did to him - he had to find his memories on his own. ML's grandpa and Mc's grandpa also transmigrated inside, one of them being the grandpa who hated MC lololol soo the middle aged lady MC saw before was actually ML's mom (such a sweetheart :))

Anyway, both of them now remember, Yaya got back her dads and everyone is happy. Btw - Yaya is really the biological daughter of both MC and ML, from a new experimental scientific study that uses only DNA from two people (regardless of sex) to make babies.

There is a lot more I omitted about MC and ML's friends, their colleagues now and before but I'm too lazy to talk about them lol just know that everyone is happy, especially the new friends who didn't know they actually were generals lmao

Also, also, MC and ML finally have s*x in the real world!!! So happy for ML who stayed a virg*n for 40 years in that virtual world since he was there from birth lol