I started reading it without looking at the synopsis, and that was a mistake. Seeing Adelaide's (protagonist's) sister for the first time I did a double take and came back to look at the synopsis, and realized that my worries weren't unfounded. It turned out to be just another story with the premise of "my sister is absolutely evil for the sake of being evil". The plot seems incredibly generic, and the antagonist, the protagonist's sister, is just a classic, cookie-cutter white lotus bitch.
Oh, right, there is one thing that is different than usual. Our protagonist knew about her sister's true character this whole time, but decided not to do anything because she... pitied her. Yeah, all of the troubles described in this story wouldn't even exist if the main character wasn't an insufferable peak of naivety. Adelaide knew about all of the vicious things her sister was doing to the servants and other people, but chose to ignore them because she knew that in the original story, her sister dies at 20, so she just... decided not to bother.
The circumstances of the very first problem, and the reason our main character meets the ML, are also straight up ridiculous. The story starts when her sister, Noella, steals the man Adelaide was supposed to marry, Jerox. Adelaide doesn't give this much thought, but we soon find out that Noella did this because to become the successor, she needs to have a spouse, since those are the household rules. And the reason Adelaide didn't know about this? Everyone thought that she'd just marry Jerox, so no one even bothered to inform her of it. Yes, it somehow wasn't ever mentioned during conversations, and Adelaide, as a successor, somehow has never seen it written anywhere. Am I really supposed to believe something like this? Seriously?
After reading through 51 chapters of Adelaide doing jack shit to actually stop Noella, and just dealing with the aftermath of every one of her plans, we're presented with... yet another white lotus bitch, without even having dealt with the first one. This was the point where I thought that the author just can't write antagonists for shit and decided that even the sunk cost fallacy couldn't keep me from dropping this hot garbage.
