Anetorare -netorimura No Inshuu- -rj01256651- -

The story follows a protagonist who returns to his ancestral rural village accompanied by his elder sister (the "Ane" in the title). The village, however, is governed by ancient, dark customs ( Inshuu ) that target outsiders and their female companions. The narrative focuses on the systematic "corruption" and eventual "taking" of the sister by the village locals as the protagonist is forced to watch or remains powerless to intervene.

It seems you're referring to a visual novel or a game titled "Anetorare -Netorimura no Inshuu-". Given the title and the code "RJ01256651" which seems to relate to a specific content identifier, possibly from a Japanese game or visual novel distribution platform like DLsite or itch.io, I'll create a general story outline based on the title's implications.