There are so many things wrong with this manga.

The setting already sounds a bit daring; Rich students can select some other student to be their servant and having to fulfill any of their wishes. To quit, the servant-student has to quit school as well. In other words, the story is about rich young brats being allowed to enslave others.

But even so, what I actually had to read was still unexpectedly fucked up for me (in the following: Kai - male main, Yuzuru - female main):
- Parents who basically sell off their child like some good, not giving a shit that she's treated like a sex-toy
- Same parents not even wanting to allow contact with the person she loves since he can't pay for their expenses (since obviously, the daughter isn't more than some damn trading good)
- Yuzuru who gets traumatisingly harassed in multiple occasions and seemingly not really care about it
- Some dude who just wants to be friends with Kai.. by constantly trying to ruin his life and amongst other things raping Yuzuru. On top of that, everybody later on just acts as if everything is totally fine (including Yuzuru herself.. because 'he already apologized!')
- The female love rival seems to also only be able to express her love by trying to ruin their lives whatsoever, explicitly wishing for Yuzuru to just get raped, and by trying to get impregnated by Kai (and thus binding him to her) by using an aphrodisiac.

And even from the romance aspect there's just too much wrong with it. They don't really do much more than having sex every 2 chapters, and honestly, I find it hard to support a romance between two characters where one of them would've seemingly been fine to rape her in the beginning.

Seriously, I neither understand people writing nor reading stuff like this (and enjoying it)... or how you could consider this a shoujo romance. I never heard of people wishing to fall in love through stockholm syndrome after being constantly molested.