It starts of by a king killing the mc's friends or family and then he goes back in time to when he was first transported from earth to somewhere with his family and meets someone on a horse and promises to be his wife in exchange for protection from the king
all I remember is that he is pretending to be a god and there's this priest who's very possessive of him and lowk abuses him, and there's a god in a diff country
https://www.mangago.me/read-manga/how_to_be_the_chosen_one/
yes this is it ty!! (=・ω・=)