Trying to find a story - main character (FM) eventually turns out to be a goddess' daughter (prob pre 2022)

[Wintermute1971]

Trying to find a story - main character (FM) eventually turns out to be a goddess' daughter in a big gothic house
IIRC the male character starts out as the neighbor's son, then gets blessed by the goddess for being with the daughter
Sorry this is so vague - story is 2022 (2023?) or earlier. Story contained MF, MFF, FF iirc as well