Responses
https://www.mangago.me/read-manga/sparkling_baby/
Side couple spinoff series from Lover Boy ^^ and the seme here was rejected by the mc in Lover Boy
https://www.mangago.me/read-manga/koi_mo_sugireba/ (main story: koi ga ochitara + sequel koi ga michitara)
https://www.mangago.me/read-manga/natsuhate_no_unknown/ (main story: cuoid ni rakurai)
Any bls with a side couple who has their own spin-off series or side stories, also bonus if the side couple includes the guy the main character rejected!!!