
BLs where a guy is in love with a girl, but ends up with another guy:
https://www.mangago.zone/read-manga/unrequited_love_rendezvous/
https://www.mangago.zone/read-manga/honey_trouble/
https://www.mangago.zone/read-manga/my_four_masters/
https://www.mangago.zone/read-manga/faded_first_love/
GLs where a girl is in love with a guy, but ends up with another girl:
https://www.mangago.zone/read-manga/level_one_dreamers/
https://www.mangago.zone/read-manga/i_love_amy/
https://www.mangago.zone/read-manga/shoujo_manga_protagonist_x_rival_san/
https://www.mangago.zone/read-manga/bad_thinking_diary/
Is there any stories where the mc(male) starts off trying to get with a girl but ends up with a guy or where the mc(female) is trying to get with a guy but ends up with a girl?