I can read these mangas many times! I rate them >9.5/10 based on my own preferences, so there will be lots of non-mainstream BL
Genres: NO PWP, no doujinshi
Length: <100 chapters or 3 vols
Search by tags: http://www.mangago.me/home/people/12706/manga/1/
If you like this list, please click "RECOMMEND". Thank you XD
2nd list: http://www.mangago.me/home/mangalist/655038/
(If 1st list is full, i'll move older ones to my 2nd list)
Long series: http://www.mangago.me/home/mangalist/645867/
Isekai, the usual transmigration, reincarnation, time travel etc. except, you know, it's gay
The highly anticipated BL list for Isekai to help fulfill your yaoi needs and wants!!!
*NOTE: This list will be updated as more BL Isekai stories are found (take note that many are ongoing/incomplete).