In a world where monster invasions are rampant and frequent, being an adventurer in a party is considered one of the most desirable jobs for the honor and fame it provides. Wanting to make a name for himself, a young human warrior named Alvin intends to start his career by completing a low-level request for the guild. While en route, Alvin is confronted by a magical bear and immediately finds himself in a pinch. As luck would have it, a dark elf healer named Karla approaches and asks if Alvin requires assistance—being seemingly oblivious to the situation before her eyes. After a discussion needlessly complicated by Karla's absurdly eccentric personality, Alvin somehow convinces her to help him. Unfortunately, instead of healing him, she accidentally casts a curse: if Alvin strays too far from her, he shall die. Despite being forced to accompany Karla until the curse is broken, Alvin remains steadfast in his ambition to become a full-fledged adventurer. With a partner by his side, the journey toward his goal may grow easier—or harder—depending on Karla's whims.

On her way to meet friends for drinks, Kaoru Nagase suddenly collapses. While attempting to fix a distortion in the space-time continuum, the god managing Earth made a mistake that resulted in Kaoru's death. Fortunately, the god preserves her mind and soul, granting her a second chance at life in another world, Verny. To make up for this divine error, Verny's goddess Celestine provides Kaoru with various blessings: a youthful body, proficiency in all languages, an item box with infinite storage, and—most importantly—the ability to spontaneously create any kind of potion, limited only by her imagination. However, her powers prove too advanced for a medieval world like Verny. As she tries to enjoy her new life and escape those who covet her abilities, Kaoru travels across different nations—but the bits of influence she leaves behind may soon amass into something out of control.