Asianfanfics.com, that is if you like kpop and tag the gay ship name but also you can tag the gender like comedy and search if they are a gay couple. I really loved that website you should try it I highly recommend this one
http://www.asianfanfics.com/story/view/1091328/dark-paradise-angst-friendship-hospital-ot7-mental-jikook-vhope
The couple is
https://s-media-cache-ak0.pinimg.com/736x/57/c6/16/57c616ec497d4ccbe9b169717fca7e11.jpg
Hope you like it!
you can use this site to download fanfics from almost all fiction sites.
I use adult fiction or fictionpress mostly.
http://ficsave.xyz/
where do you guys usually read BL novel or America M/M slash stories? beside ao3, wattpad?
or do you know some website let me read/download yaoi novel?