@Asianbou
It's somewhat of a common trope in Chinese or Korean manga where the background shows the child to be abused and neglected. Then the child is taken in to a better family and then lots of fluffiness ensues and the bad guys and parents are eventually destroyed. Or another common trope where the emperor or high ranking duke is an asshole but over the course of time, due to the daughter's fluffiness, starts to stop being an asshole and seek redemption. The reason why it's considered slice-of-life is because a lot of times, it truly is full of sweetness and fluffiness. Basically sweetness and fluffiness prevails over assholes, abusers, and darkness.
I generally prefer the first trope but there are some good ones for the second trope. Some examples of good ones of both are as followed.
First trope:
The Monster Duchess and Contract Princess (Child abused by parents and adopted by a duchess known for her physical strength. Sugary sweetness ensues. The duchess and her sons are cool and sweet.)
I Am a Child of This House (Abused child sold off to duke. Sugary sweetness ensues. The duke and his son are just so sweet.)
Second trope:
Who Made Me a Princess (Father is the emperor. He's a competent asshole but he slowly becomes better.)
Daughter of the Emperor (Father is the emperor. He's also competent. Talks like an asshole but turns out he's a lot more mellow and kind than he looks, lol.)
This manga seems to be following the second trope. That being said, I have yet to read Chinese mangas with these tropes. And so far, it seems to be kind of disappointing.
EDIT: Nope, it gets even worse. People, just ignore this one and go read the other ones. They also have good art AND it's fluffy and sweet. This is just abusive all the way through.