Any yaoi manga that has a supernatural theme? Like demons and stuff, I've read koori no ma...

naono bohra's works are 99% supernatural with a lot of romance

http://www.mangago.zone/read-manga/jigoku_meguri/

http://www.mangago.zone/read-manga/akuma_no_himitsu/

http://www.mangago.zone/read-manga/taiyou_no_romance/

http://www.mangago.zone/read-manga/datte_maou_sama_wa_kare_ga_kirai/
http://www.mangago.zone/read-manga/monster_petite_panic/
http://www.mangago.zone/read-manga/coyote_zariya_ranmaru/
http://www.mangago.zone/read-manga/crimson_spell/
http://www.mangago.zone/read-manga/kami_sama_no_iutoori_moegi_yuu/
http://www.mangago.zone/read-manga/konya_mo_nemurenai/
http://www.mangago.zone/read-manga/kimi_to_kore_kara/
http://www.mangago.zone/read-manga/shinpu_sama_no_kyuuketsuki/
http://www.mangago.zone/read-manga/uragiri_wa_boku_no_namae_wo_shitteiru/
http://www.mangago.zone/read-manga/raising_a_bat/
http://www.mangago.zone/read-manga/fukouchuu_no_shiawase/

Genwaku no Kodou

http://www.mangago.zone/home/mangalist/32538/
Try some of these