The prefix indicates it was downloaded from otomi-games.com , a site known for hosting visual novels, dating sims, and otome games (games marketed toward women that focus on romance and plot).
Ensure you have parts 1, 2, and any others downloaded. otomi-games.com_QYIR6JUO.part3.rar
Because it is a .part3.rar file, it is incomplete on its own. You generally need all other parts (Part 1, Part 2, etc.) in the same folder to extract the full game successfully. The prefix indicates it was downloaded from otomi-games