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)
yandere/yandere-adjacent characters: numero tres!
a mix of shoujo, platonic, and BL/GL content.
if you want more, check out part 1 & 2 of this list!
-pt 1: https://www.mangago.me/home/mangalist/1674723/
-pt 2: https://www.mangago.me/home/mangalist/1904522/