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/
3rd list: https://www.mangago.me/home/mangalist/3746699/
(IF 1ST LIST IS FULL, I'LL MOVE OLDER ONES TO MY LIST 2&3)
Isekai BL
Reincarnation, Transmigration
Reincarnated in Another World
Reincarnated in a Game World
Reincarnated in a Book World
Transported to Another World
Reincarnated Lover
Multiple Reincarnation
Reincarnated in the Past
Time Travel
Time Rewind
⁃ submissive ukes (w/wo BDSM)
⁃ sexy ukes
⁃ harassment/blackmail/revenge/kidnapping
⁃ rapist/asshole semes
⁃ peachy/juicy butt
⁃ tight hole defiled
⁃ big dick
⁃ buff/muscular ukes
⁃ uke w/ low self-esteem
⁃ younger ukes
⁃ shorter ukes
⁃ employee a/o boss ukes
⁃ student a/o teacher ukes
⁃ older ukes & age gap
⁃ rich/poor ukes
⁃ servant/slave ukes
⁃ demon ukes
⁃ cross-dresser ukes
⁃ enemies to lovers
⁃ fuck buddies
⁃ !ncest/ped0 kinks