If you are looking for a specific title, you might check the comprehensive English Otome Games List or the VNDB (Visual Novel Database) using the file's metadata.
Do you have any about the file size or the cover art that might help identify the specific game? otomi-games.com_NGCJDJ7L.rar
Based on the typical tropes and top-rated titles in this genre, the "proper story" contained within such a file would likely follow one of these popular narratives: If you are looking for a specific title,
The protagonist is drawn into a world of vampires, demons, or deities—such as the popular Diabolik Lovers or Hakuoki series—where the stakes are both romantic and life-threatening. otomi-games.com_NGCJDJ7L.rar