Joanna Jordan, who wields SSS-rank Psionic Power, reigned over the apocalypse, but accidentally transmigrated while slaying Zombies. She wakes up in an interstellar Beastkin Realm, only to find she has become the lowest F-rank female. With supplies stored in her Inventory Space and her SSS-rank Psionic Power, she tames a disabled Bound Guardian Beast, and leads them to build a business in the interstellar world: she heals the gravely injured, reclaims wasteland to grow fruits and vegetables, and builds a Galactic Empire of interstellar agriculture entirely on her own, rising from the scorned low-rank female to become the wealthiest person in the Beastkin Realm.
