Lmk toooo
So, that is kind of oddly specific lol, but I hope I can be of help here
University setting, but still cute: https://www.mangago.zone/read-manga/sweet_hour_1r/
School setting, supernatural: https://www.mangago.zone/read-manga/inoue_kun_hajimemasen_ka/
And I don't really know anymore, sorry ┗( T﹏T )┛
BAHAHA THIS IS SO SPECIFIC
its completely fine
https://www.mangago.zone/read-manga/mihanada_pectolite/
https://www.mangago.zone/read-manga/bokura_no_tsuzuki/
https://www.mangago.zone/read-manga/summer_snow_1/ (has like 70+ chps tho)
These are some of my fav bls that matches your description hope you enjoy them:)
pls give me some 6 chpt type bl YAOI with the wholesome cheerful pure top and the quiet reserved but cute bottom! no rape or ex lovers coming back..and HIGH SCHOOL SETTING