The free will thing becomes a major plot point in the story as we learn that the host body she has taken over has a very unique body and is meant as the final sacrifice. She has the ability to do a blood burning technique which is unbelievably powerful. It also allows her body to be the single sacrifice needed to unseal a powerful weapon to kill the ML. Something she refuses to do even though the antagonists keep trying to use the "sacrifice the one for the many" argument.

Turns out, he's also from the same bloodline as the MC (only he was born well before she was) and was sealed by the Heavenly Dao sect. He can perform the same blood burning technique which makes him also a capable sacrifice. Only, the sect lost control of him as he was far too powerful.

Which makes sense, given that one of his parents is an incredibly powerful demon that they had trapped away. It's also a bit squicky as it's implied that the sect was going to use that demon to help the MC produce the next generation.

At the end of the story, he goes mildly nuclear against the sect (justifiably) and releases all the souls they had kept from properly reincarnating.

The original FL became more assertive and readily expressed her feelings while the original ML became incredibly dedicated to his FL. In fact, the original story portrays him as a bit of a man-ho as it's a harem story but he ends up being incredibly happy to soothe or coax his FL after the MC changes things.

Their change is so radical that the system even indicates the story has completely gone off the rails from what it was supposed to be.

Hm. I've decided to drop this. It's a bit repetitive and I'm not really enjoying the overall plot, which is mostly based on annoying things being done by annoying people.

It has some likeable interactions at times between the two main characters. I appreciate that the MC is more whimsically pragmatic than strictly moral, because sometimes that is burdensome to read when they also have a system making them do things. I appreciate that the ML genuinely has a reason for being cruel and heartless, rather than it just being his nature and randomly changing because he met a Not Like Other Girls.

However, I also dislike it when the main couple has a power imbalance that involves one person trying to appease the other, who tends to exert their own will a lot. I know this story is about how they gradually go from that state to one of mutual caring, but it's draaaaaaaggging and it means I'm finding half of their interactions irritating rather than enjoyable. I don't have the patience to see if this story ever fully makes them equal (it may, but it will take a while, and I'm not confident it won't maintain some ML overbearingbess for the "humour" etc.).

The novel that the MC has transmigrated into is repetitive and full of annoying characters, and therefore we have to see this story play out. New characters pop up to get in our MC's way and make completing her system tasks harder. Because the author is low-key making fun of how inane the type of novel that the MC has transmigrated into is, the characters are inane and annoying. Where they're not, they're still hindering the MC in some irritating way and I'm just starting to find it more and more tiresome. A lot of the "humour" is based around people being irritating or foolish (including the main characters at times), and even when it allows one of the main couple to be clever or original, the situations low-key grate on me rather than make me laugh. I don't actually care about any of these characters the system is making her help, and that's a big problem.

It might be worth sticking around to find out, I just don't have the patience to.

メ Further depth and explanation on world sytem and FL. Isn't she need to hop on 5yrs to other world if she completed task? So what should happened next.

メ The arc of Princess/Marquis was open-ending and what happened to them after.

メ Some questions left unanswered.

メ Extra chapters are unneccessary, should have used chapters for future, etc.

Why is the FL so at ease about killing... if you put a normal person in her shoes, there should be some adaptation period.

How did the FL turn from a weakling to an OP Queen after the big incident. It wasn’t really well explained, just vaguely glossed over about how she got a power boost.

and a few more but I forgot hehe