Responses
1. The uke is chubby at first but the story is really adorable
https://www.mangago.zone/read-manga/mimasaka_kun_to_mayoeru_kobuta/
2. Friends to lovers
https://www.mangago.zone/read-manga/soredemo_yasashii_koi_o_suru/
3. This is a manhwa, slow burn/age gap
https://www.mangago.zone/read-manga/form_of_sympathy/
4. Friends to lovers / straight seme x gay uke
https://www.mangago.zone/read-manga/mukuwarenai_koi_no_uranaikata/
5. this a little messed up
https://www.mangago.zone/read-manga/kakkou_no_yume/
Hope it helps
any stories where the uke has an unrequited love for the seme, but the seme is in love with someone else —but in the end, seme somehow falls in love with the uke and they get together?