Do any Yaois exists that have a hot demon :^......along for research purposes

If you’re doing research, you should define your parameters for a demon or else you might get some unwanted results. Anyways:
http://www.mangago.zone/read-manga/the_pressure_of_an_evil_spirit_sweetly_dripping/
http://www.mangago.zone/read-manga/joukyuu_mazoku_no_otoshikata/
http://www.mangago.zone/read-manga/bouzu_to_kumo_buddhist_priest_spider/
http://www.mangago.zone/read-manga/badass/
http://www.mangago.zone/read-manga/madk/

Dear door