http://www.mangago.me/read-manga/my_blood_and_soul_to_you/
Here’s the second one
Could the first one be this? The uke is not a sex worker tho, just a masochist who loves casual sex
http://www.mangago.me/read-manga/osananajimi_ga_do_m_de_tsundere_nan_desu_ga/
First one could be this...
http://www.mangago.me/read-manga/kocchi_muite_ai/
Another noisy neighbour, ha
http://www.mangago.me/read-manga/gintama_dj_ochiru/

I'm looking for a manga about a guy who iss a sex worker the nabiors kid really liked him and sense his room is right next to his every time he had someine over he could hear it . And the second one is about a demon and a vampire who meat in a club to eat but realized they are both kind in the same spices and then the demon drank the vampire 500year old blood and became his food source