Responses
They're not exactly hoobae-sunbae but similar premise: https://www.mangago.zone/read-manga/why_are_you_so_kind_to_everyone_except_me/
Is it this one?
https://www.mangago.zone/read-manga/exploratory_battle/
Nooooo ┗( T﹏T )┛
Basically this manhwa revolves to two students who became group members in a school, the sunbae likes the hoobae but he doesn’t want to be obvious so the hoobae thought that the sunbae hates him. Sunbae is uke and hoobae is seme btw. Plssss help me find ittttt ╥﹏╥