Tensei Shoujo wa Mazu Ippo kara Hajimetai: Mamono ga Iru Toka Kiitenai!

Sarasa Ichinokura has endured a relentless, unexplained exhaustion for as long as she can remember. Even after becoming an office worker, the fatigue never lifts. One night, after collapsing into bed from sheer weariness, she is visited by a mysterious figure claiming to be a goddess, who reveals that her lifelong lethargy stems from a severe deficiency of magical energy known as mana. Before Sarasa can fully comprehend this revelation, she is abruptly transported to another world entirely. She awakens in the body of a ten-year-old girl, stranded in an unfamiliar wilderness teeming with soaring beasts and massive wolves. Bracing herself for danger, she is unexpectedly rescued by a monster hunter named Nelly, who offers her shelter. However, now that Sarasa finally possesses the vitality she always lacked, remaining confined to a remote cabin feels unbearable. Armed with newfound energy and a fierce desire for independence, she resolves to master magic so she can navigate this perilous realm on her own terms. Progress may be gradual, but Sarasa is determined to forge her new life deliberately, taking her reincarnation one step at a time.