Megumi-chan harbors a mysterious past where she once existed as a boy until encountering a seemingly magical individual. This enigmatic figure bestows upon her a mystical tome containing a genie capable of fulfilling desires through a peculiar ritual involving blood. Wishing to inhabit a male form, Megumi triggers the genie's power, only to be transformed into a 9-year-old girl instead. As time elapses, Megumi embarks on her high school journey, promptly standing up to the resident bully who unexpectedly finds himself enamored by her courage. Determined to undo the unintended consequences of her wish, Megumi endeavors to locate the elusive book holding the key to reversing her enchantment.