This is a high school bl manga I read a while ago. Can’t remember much but both were into aviation ? And space and wanted to become aerospace engineers or something. Pretty sure it was popular.
this? https://www.mangago.me/read-manga/we_re_still_in_the_spring_of_life/ https://www.mangago.me/read-manga/boku_tachi_wa_mada_aoku_daigaku_nyuugaku_hen/
This is a high school bl manga I read a while ago. Can’t remember much but both were into aviation ? And space and wanted to become aerospace engineers or something. Pretty sure it was popular.