Responses
It's probably this one.
https://www.mangago.me/read-manga/haru_to_natsu_to_nacchan_to_aki_to_fuyu_to_boku/
YES OMG TYSM
yaoi manga where the couple is already established. its style is kinda slice of life-ish and they were from the country side. i remember them having a gap in height and the taller one had a mole somewhere in his face. they were childhood friends i think and are now from the same friend group. i think their other friends knew they were dating. the cover iirc was collage-y with the taller one kissing tge shorter guy's cheek as the highlight.