All of these are completed
https://www.mangago.zone/read-manga/heart_stain/
https://www.mangago.zone/read-manga/jazz_for_two/
https://www.mangago.zone/read-manga/don_t_leave_after_school/
https://www.mangago.zone/read-manga/heesu_in_class_2/
https://www.mangago.zone/read-manga/the_story_about_you_x_me/
https://www.mangago.zone/read-manga/between_the_stars/
https://www.mangago.zone/read-manga/cosmic_boy/
https://www.mangago.zone/read-manga/geu_kkeute_issneun_geos/
https://www.mangago.zone/read-manga/false_memories_lee_gpiee/
https://www.mangago.zone/read-manga/unluckily_lucky/
https://www.mangago.zone/read-manga/this_fluffy_love/
https://www.mangago.zone/read-manga/geu_kkeute_issneun_geos/
https://www.mangago.zone/read-manga/don_t_leave_after_school/
https://www.mangago.zone/read-manga/too_close/ hs/ university
https://www.mangago.zone/read-manga/save_me_gently/
https://www.mangago.zone/read-manga/my_high_school_romance/ it is completed
https://www.mangago.zone/read-manga/the_story_about_you_x_me/
Pls rec some high school bl with 50+ chaps and completed if possible (づ￣ ³￣)づ