every yaoi where the couple is living together for whatever reason
(dormitory, work, roomsharing...)
it doesn`t count when the couple is moving in together only at the end of the manga,
there has to be at least one chapter happening while they are living together
for guys living together because they are kindred try my incest list
(it`s noted down in the review if it is with or without blood relations)
http://www.mangago.me/home/mangalist/11763/ 
Pet Wo Kaimashou