Responses
(I don't know if this is close to the description of the story you were looking for, but I remembered this story when I saw what you were looking for.)
https://www.mangago.zone/read-manga/a_link_between_relationships/
Can sm recommend me some bl where the mc has a crush on his friend or sm but ends up being with that persons sibling
If someone has a list for this type of genre please give it to me