When humanity teeters on the edge of collapse because of an extraterrestrial menace known as Pillars, a self‑styled deity called Odin surfaces and grants the populace the gift of "Valkyries"—female warriors who command antique planes dubbed Hero Wings.
Claudia "Schwertleite" Bruford stands as the top pilot of the European Valkyrie Squadron. After a Japanese S‑class Valkyrie falls in combat, Claudia is sent to Japan as her successor. Yet, with a grim history of being the lone survivor on each sortie—earning her moniker "Grim Reaper"—she suspects she already knows the reason for her selection.
Ready to face rejection once more, she arrives at the Tateyama Valkyrie Squadron. Unbeknownst to her, her new teammates are a crew of eccentrics who refuse to accept her ominous nickname!
