Following her triumphant victory over an enemy kingdom, Commander Liza Mary returned home to the Empire of Phaeton with great fanfare, only to have her joyous homecoming dashed by her fiancé, Illian, who shattered her heart by leaving her for the princess of the defeated realm, Flora. Struggling to cope with the pain of this profound betrayal, Liza turns to alcohol to ease her anguish and awakens, disoriented and confused, in the body of a timid high school student named Doeun. As she seeks to understand the mysteries surrounding her inexplicable transformation, Liza receives help from Ian and Lora, who bear a striking resemblance to Illian and Flora, and offer their aid in her quest to return to her own world.