CZ’s continued journey was because of ML and not actually the system. Honestly when the main system let slip that ML refused any and everyone expect CZ (and that they really did try other hosts!) I was sold on the pair.

HE

1. Adopted son x father - I mean, maybe not 100% unique but it was still a bit unique, Chi Zhao was just selling meng here lol. Also Li Yihan is such a stalker and system is so powerless hahhaha, I really liked how Chi Zhao's difference to others were shown here, he was just too good to do all of those harm to Li Yihan. It's also funny how CZ and the system doesn't know where they did anything wrong when the plot lines do not happen, lol. This was also the arc where CZ had to have many partners lol.
2. Traitor young master x saved admiral - I really liked this. I mean, the beginning was such a death flag to the plot lines loll where CZ had to save the ML. Hahahha I love controlled CZ and the way he still does things harder to not harm people, I mean, how can u not love him. The last suspense scene was really good, who would even think of planting a bomb in the blood, I liked how it was shown to everyone how CZ was not doing things willingly and really liked the ML. The brother is also loveable hehehe (also OP CZ hehehe)
3. Actor x entertainment tycoon - I can't. I don't even know what happened here because it was so weird lol, CZ could've literally slept his way through this HAHHAA but the ML was just 'nope' lol, the hidden plot line tho AHAHAHAH This seemed impossible for real, and seemed really really toxic, probably in other peoples view in this world, but since we know real MC and ML it was possible. The psychiatrist was also nice to have, made me realize how affected the'wouldve-been-partners' of the ML would be. It was sad tho how painful it mustve been for the ML
4. Emperor x prince regent - this was just sadd, this is the arc where MC has been heartless, but it was because the ML was literally reborned! Would've wanted more when sixteen but I guess it would be useless cause real ML was there. System and MC was just so confused why everything is going wrong with the MLs attitude toward MC. Also it was so sad with the jade pendant uWu. Still a happy ending tho. Also the shadow guards were lol. It was nice that CZ still couldn't be so heartless in the end (prison).
5. Powerful (phoenix) guide x wolf sentinel feat a child - I think it was my first time encountering an MC who had a child, because the excuses in others was that they weren't from that world and couldn't leave something, guess its because the worlds were technically not real so there was no such issues. I LOVE MC having a kid, the start just showed that plot would be astray lol, I love MC and ML family. I love powerful CZ. Probably my fave, cause of the kid and the phoenix (which wasn't explained what that meant btw) and the wolf heehhe just like them
6. Father x adopted and abused son - IDEK how the author could think of this. MC's role was so so so bad and irredeemable here and to even make the abused son be the ML, so so so messed up !! Lol, I am so glad CZ took over and showed care to those poor kids. I also felt really hurt when CZ thought his ML was not there. This was really messy wo compared to my fave arc, I didn't like this much, but I am very much happy for father and of course Wen yu.
7. Youngest junior disciple x eldest senior disciple - I don't like wuxia (?) much, but I like how MC can just be open here, and also sad how he though it would be the end. The MC x ML here was not much, probably cause it was simple, so the role of background characters here were huge, and tho its a nice story, I would've like more chapters with the next arc which are mainly MC and ML. It was quite nice tho, to see a bit blackened CZ heheheh
8. Real world - awww, I'm just so glad they met in real life and for the system thank u very much heheheh

I had thought it would be some serious crime such as corruption or involvement with underworld that got him sentenced but was I relieved to know that he only wanted to beat the bastard who wanted to r*pe his sister to death!

I cried really hard at the fake parting scene in the second arc the way MC said"I don't wanna see you die in front of me again" was so sad like that scene is to me the most touching scene in this novel loved it

MC must hurt ML (except in the 7th world) --> MC can't do it --> MC and ML live happily ever after

with dreams of becoming a top singer

Really deserving to be specialize gong-abuse plots, even a reader like me was abuse a little *sniffs*. Thankfully, both of them managed to turn every world into a HE. This is also a quite unique take on QT tropes. Giving a reason for why the system/main system exist and the task that were given. I was genuinely surprised that those worlds serve as jail sentence in the ML's world. But too bad that ML's life on his original world wasn't elaborate enough. I'm very curious about the nature of his job and whatnot back in his world.