@half_blinde There isn't much to the story, so I'll give a critique on what you got so far.
1. Mystic Eyes of Exposition
As much as I hate exposition, it's a necessary evil if you want the reader to understand the story. The trick is to balance the deadly line between not-enough-information and too-much-information at a single time.
You put a brief explanation of Occulos as an auxiliary chapter but don't rely on that as your sole way of communicating the magic system. Always assume that people haven't read that chapter.
Also, the auxiliary chapter doesn't answer everything about the magic system. What can people do with magic? What can people not do? Are there any limitations? Does magic affect the economy? Does it affect the jobs that people have? Since it's an auxiliary chapter, it's fine to go ham with an entire wall of exposition, but make sure that you still convey everything within the story itself.
Even though the story is only two chapters thus far, but you should have given at least a little idea of what magic can do. You also didn't explain what "aer" is. I can infer, but when it comes to magic systems, the reader's enjoyment is directly proportional to how much they understand the magic (loosely paraphrasing Brandon Sanderson).
The opening scene of Lilith dying could be much more impactful if the Magenta-eyed guy used some crazy magic. Spectacular fight scenes are one of the bests ways to open a novel.
2. Greeeeeeease
I'm sure have a good reason for making the title Grease, but I immediately thought about that one '70s movie with John Travolta when I saw your novel. If possible, try to avoid naming conflicts. This is mainly a minor thing to avoid confusion.
Also, your novel is labeled as a fantasy romance...? So is it like Beauty and Beast, but Beauty and the Cyan Cat? I thought your novel was a revenge thriller.
3. Reincarnated as a __________
We've got Reincarnated as a Slime, Reincarnated as a Spider, and Reincarnated as a War General Loli. Now, we've got Reincarnated as a...Cyan Cat...?
Reincarnation has become so saturated that most novels will have to have some sort of twist if they want to make sales. In your case, that twist is being reincarnated as a cyan cat. But why? You might have a good reason that you'll reveal later in the plot, but as of now, I'm left thinking that the concept is pretty dumb (no offense).
I don't want to bash on the concept too hard because I don't want you to rewrite your whole novel if you can avoid it. But, it's still in its early stages, so fixing up some stuff shouldn't be too much of an issue.
Also, this is a personal nitpick of mine, but I hate it when reincarnation happens for no reason. This doesn't always mean the story is bad per se. For instance, I really enjoyed "Mushoku Tensei." Still, I'm having trouble figuring out how you'll make a cohesive revenge thriller from the perspective of a cat. You can always prove me wrong, of course, and blow me away with an amazing plot, but it would make more sense if the reader knew why Lilith is now a cat.
3. Two-sentence Synopsis
Your synopsis is too short. You've successfully established the main character and the main conflict, but not the setting. Try to give some more background information. I put a link at the bottom for help if you want.
4. Empty Room Syndrome
When you don't give enough information on the setting of a scene, the reader will end up imagining an empty room. That's what I "Empty Room Syndrome." In your case, it's more of an "Empty Worldbuilding Syndrome." I have no idea about the world's technology, society, architecture, and all that stuff.
Of course, you only have two chapters, but at least describe what time period this is. If you don't establish the time period, some people might imagine it as a classic fantasy world, while others will view it as a modern-day society. As of now, I can't tell which what your novel is, but the main character mentioned a "hidden-camera prank," so I assume the technology is modern.
Reference material:
This is extra stuff to help you out:
Exposition:
Writing a blurb/synopsis: https://blog.reedsy.com/write-blurb-novel/