Responses
Couldn’t find much that fits your description…
https://www.mangago.me/read-manga/yatamomo/
It’s a novel but fits your description
https://www.novelupdates.com/series/in-zombie-stories-tash-always-survives-the-longest/
Hope these work for u
Thank
Yaoi with a suicidal uke that deliberately sleeps around to get an STD