How gay we talking? If you just want a BL that otherwise takes itself as a real thriller story, try No. 6, it even has an anime that's very good! (though the ending is incomplete for the anime). Kano recently made some furry art of one of the boys too that made my heart explode..
I'm re-reading The Summer Hikaru Died thanks to the anime announcement. It's very fun Eldritch Horror with some gay themes and an underlying statement about rural Japan's homophobia.
Comments
Malum Discordiae by Ashelyn Drewek is good, two rival witch guys who hate each other who make out.
The Wolf at the Door by Charlie Adhara, Werewolf and totally not Dale Cooper from Twin Peaks smooching
I also like the Will Darling Adventures by KJ Charles (early 1900’s + action + suspense + mostly vanilla)
Remnant Kemnohito Omegaverse
Love is an Illusion OMegaverse
Hontou Yajuu
https://en.m.wikipedia.org/wiki/Grandmaster_of_Demonic_Cultivation
Also the Wize Wize Beasts of the Wizarding Wizdoms is good as well