Responses
https://www.mangago.zone/read-manga/uchi_wa_futago_de_teippai/
https://www.mangago.zone/read-manga/eunsoo_s_good_day/
https://www.mangago.zone/read-manga/futago_kareshi/
https://www.mangago.zone/read-manga/ai_to_makoto_moriyo/
https://www.mangago.zone/read-manga/futari_no_musuko_ni_nerawarete_imasu/
https://www.mangago.zone/read-manga/raon_s_man/
You can try those (=・ω・=)
Does anyone know a possessive bl where two twins fight over the protagonist?