Ichinokura Sarasa had always suffered from a weak constitution that left her constantly exhausted. Even so, she managed to find a job and work hard. But in the end, she collapsed, and when she came to, she found herself in the room of a goddess from another world. You have a body that requires magical power, but you were born on Earth, where none exists. Shocked by the goddess’s words, Sarasa learns that her body actually needs magic to function properly. To save her, the goddess decides to reincarnate her into another world, Trilgaea! Now reborn as a ten-year-old girl and freed from her frailty, Sarasa is ready to embrace a new, hope-filled life. However, she soon discovers she’s been dropped into a mountain teeming with monsters, where even stepping outside is dangerous! And so begins Sarasa’s slow life in another world, starting with her struggle just to set foot outside.