I recommend

Cute, naive and insanely addictive. I love it!

A school where rich people are permitted to have some sort of "companions" and a girl is trapped by the bad boy. 🌚
It has 'beautiful' smut, a lot of sexual references and it's a school life/rich manga. Being honest, I love the drawings of this author and her work, so I might be a little biased coming from her. It's a good story.

A magical school of people with "Alices" (powers), where the principal character enters.
Okay, so here's the deal. It's a beautiful story. The lead male character will make your heart beat faster and you will love him. The problem? They seem too much childish to me! The art makes them look so young that I struggle to see such a mature romance between them (feelings, not smut). But, apart from that, is a really original and well-written story.

It's kind of typical in the mangas now, the girl who has crazy abilities or something like that, but I couldn't care less. This manga is about an alternative futuristic world where girls are in danger in society, that why the protagonist decides to gender-bend. It has mafia, shots and crazy, ridiculous situations which will make you addict to it. And romance. Do I need to add more?

A princess tired of the palace leaves with three thiefs. Hot guy, cheerful girl and kinda short story, but with amazing drawing and beautiful plot.

A girl discovers that she is a witch and has lots of power. A knight comes to protect her because stuff has hapened.
Okay, so in this site is not completed, but I found it in a Spanish site and I loved it. The art is one of the most beautiful ones I've seen, although it's a mature one, kids! Lots of 'Twister-playing' through the story, but it's handled well. It's just a beeeeeeeeautiful story.

Prince wants to marry princess from a foreign country to stop the war.