The story is set in medieval times, in the planet Warand.
A raising sim where you take control of one of three protagonists over the space of a year.

Diana is the second Princess of the Kingdom of Klein (her hobby is collecting hats).
Mei is a regular high school student from the human world who was accidentally summoned to the Royal Academy of Magic.
Sylphis is a knight apprentice from a race that chooses their gender once they start puberty.

The player's character will spend a year at Klein to achieve the proper magic abilities.
Their fate is in the hands of the player.

[Edited from SNESorama]