As far as she is concerned, middle school student Anzu Momose is as plain as can be—just the way she prefers. But when her brother, a genius inventor driven by his foolish fantasies, creates a device to make him more popular with girls, it malfunctions and ends up affecting her instead.

Now sought after by every female, Anzu soon finds herself on the run to escape the clutches of those looking to get up close and personal with her. But when her brother's android, Salmiakki, comes to her rescue, Anzu finds that she may have a way to deal with her newfound condition.