Recommendations?????

Depends. Do you want it to be a healthy bdsm relationship or something a bit more intense?

sflower
sadistic beauty

http://www.mangago.me/read-manga/ai_subeki_sadist/

I don't really care just something

Idk if you like straight seinen stuff but this one goes rly in-depth with BDSM and is super long

http://www.mangago.me/read-manga/nana_to_kaoru/

Thx for the recommendations!!!