Irina is a vampire that harbors hatred for humans. Despite having a fear of heights, she volunteered as an experimental subject in order to become the first cosmonaut.

Due to an incident you were dropped from the roster of cosmonaut candidates and have been reassigned to monitor and train Irina. You will live in a dorm alongside her and adjust your schedule to train her at night. Due to government policy on top of racial prejudice Irina is officially designated "N44" as an experiment and is not to be treated as a person. Aside from Anya, a researcher assigned to Irina, all other personnel treat N44 with various levels of contempt.

Setting is pre-spaceflight Earth without modern technology. Scenario takes place on an isolated military compound near a small town.

Based on the anime Tsuki to Laika to Nosferatu