Short BL Manga

https://www.mangago.zone/read-manga/falling_star/
https://www.mangago.zone/read-manga/40_made_ni_shitai_10_no_koto/

https://www.mangago.zone/home/mangalist/2253224/

If what you are looking for is not specially Japanese mangas then here you go .. there is no Rape in these short reads either ...

https://www.mangago.zone/read-manga/spreading_you_out/
https://www.mangago.zone/read-manga/off_track_crush/
https://www.mangago.zone/read-manga/behind_the_scenes_scandal/
https://www.mangago.zone/read-manga/he_guanyu_xu_xingchen/
( Short chapters like 19 days )
https://www.mangago.zone/read-manga/camping/
https://www.mangago.zone/read-manga/merry_on_the_rocks/
https://www.mangago.zone/read-manga/meaning_of_his_gaze/
https://www.mangago.zone/read-manga/non_refundable_alpha/
( Omegaverse, arranged marriage)

https://www.mangago.zone/home/mangalist/1280597/