Try these(◍•ᴗ•◍):
https://www.mangago.me/read-manga/classmate_relationship/
https://www.mangago.me/read-manga/a_small_coin/
https://www.mangago.me/read-manga/thirty_years_old/
https://www.mangago.me/read-manga/fragile_relationship/
https://www.mangago.me/read-manga/too_close/
https://www.mangago.me/read-manga/fatal_oxygen/
https://www.mangago.me/read-manga/heesu_in_class_2/
https://www.mangago.me/read-manga/house_keeper_s_cafe/
https://www.mangago.me/read-manga/hyung_you_re_my_idol/
https://www.mangago.me/read-manga/please_help_me_upon_my_arrival/
https://www.mangago.me/read-manga/whose_baby_is_it/
https://www.mangago.me/read-manga/twenty_twenty/
https://www.mangago.me/read-manga/let_s_have_a_baby_dragon/
these r the ones I have that are 100+ ch all shounen ai
sorry I did it twice just ignore the second one
i want to read some long stories. colored would be great! if you know some stories or if you have a list please tell me :)