I’m looking for any yaoi where the mc is quite at school, maybe gloomy and either has no...

http://www.mangago.zone/read-manga/cosmic_boy/

http://www.mangago.zone/read-manga/konbini_kun/
i dont know if this fits your criteria or not..

http://www.mangago.zone/read-manga/cherry_blossoms_after_winter/?av=4
http://www.mangago.zone/read-manga/back_to_school/

http://www.mangago.zone/read-manga/seikaku_kuzu_de_nani_ga_warui/
http://www.mangago.zone/read-manga/houkago_hachimitsu/

http://www.mangago.zone/read-manga/negative_kun_to_positive_kun/

http://www.mangago.zone/read-manga/the_good_luck_story_of_an_unlucky_guy/

http://www.mangago.zone/read-manga/if_you_hate_me_that_much/

http://www.mangago.zone/read-manga/doukyuusei_nakamura_asumiko/