https://www.mangago.zone/read-manga/i_wish_her_love_could_come_true/ (manga; girl A likes girl B, girl B likes boy, boy likes girl A)
https://www.mangago.zone/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/ (manga; a girl and a guy are in love with the same girl)
https://www.mangago.zone/read-manga/the_witches_isle/ (manhwa; a girl and a guy are in love with the same girl)
https://www.mangago.zone/read-manga/uso_no_tsukenai_otoshi_goro/ (manhwa; a girl and a guy are in love with the same girl)
https://www.mangago.zone/read-manga/kimi_iro_parasite/ (manga; a guy and a girl are in love with the same guy)
https://www.mangago.zone/read-manga/ao_no_flag/ (manga; a guy and a girl are in love with the same guy)
Like that summer where 2 ml and one fl where guy is actually considering.. like it shouldnt be obvious who mc gonna end up with
it can be other way round like 2fl one ml.. actually never saw something like this here