Irina Luminesk, a vampire chosen for the Zirnitra Union's secret cosmonaut program, is treated as disposable, a member of a feared and cursed species rather than a person, until she is placed under the watch of the human soldier Lev Leps. As their mission toward the stars puts Irina through trials no human could endure, Lev starts to see her as someone worth protecting rather than a tool for the space race. This light novel series is the source material behind the Tsuki to Laika to Nosferatu manga.