Hello, I'm looking for yaoi mangas with a bad boy x bad boy pairing.

This might b a bit much bt: caste system is bad boy x bad boy, and pure is good too, (the art is eh tho)
http://www.mangago.me/read-manga/pure_dakkang/

whoops not caste system, caste heaven

Thank you! I've read Cast Heaven but I dropped it some chapters ago. It was getting too dark for me.