Hello everyone, thank you for reading, Iam looking for a drama with these recommendations:

aggressive romance, cruelty, it can be rich man who buys a woman or makes a contract with her for money .

like they love each other so crazily, Iam okay with torture.

Thank you

 Sealed with a kiss

Lady & Liar

Sawan Biang

Le Jun Kai (i think but memory is a bit vague)

Secret 

Also Sealed With A Kiss which was mentioned above has the exact elements you mentioned: a man who "buys" a woman (though it's out of revenge) and keeps her on a luxurious home. 

There is a turkish drama called "Siyah beyaz aşk" (Black and white love). I love this drama a lot. Hero is a rich mafia guy. He is a badass and dominant character. He is very smart, handsome and sexy. Heroine is a doctor. She is a naive, good girl who loves helping people. She doesn't like bad boys. The hero falls for heroine very early on.. in the 1st episode itself. He is very fascinated by her. He is very possessive, jealous and protective of her. The heroine takes some time to fall in love with him as he kidnaps her in the beginning and behaves like a jerk. He is super obsessive over her. Though it is a dark romance, there is no rape. The main leads chemistry is incredible. The music is wonderful. Overall the show is simply amazing. You can check out these videos.

https://youtu.be/D-3nJ3BPdVw

https://youtu.be/pNnGttXglBI

There is a facebook fan page which provides english subtitles for this drama.