https://www.mangago.zone/read-manga/delivery_knight/
https://www.mangago.zone/read-manga/solo_farming_in_the_tower/
https://www.mangago.zone/read-manga/monster_child/
https://www.mangago.zone/read-manga/brother_am_i_cute_lovena_luv/
https://www.mangago.zone/read-manga/survive_romance/
https://www.mangago.zone/read-manga/hand_jumper/
https://www.mangago.zone/read-manga/killing_time/
https://www.mangago.zone/read-manga/suicide_notes_laid_on_the_table/
https://www.mangago.zone/read-manga/lord_please_turn_me_back_into_a_devil/
yo thanks~~~ i haven't read most of these
sankyu~~
Female Lead or Male Lead with no romance involved
no hint of any romance (at all or barely)
genre doesn't matter