In preparation of the King Arthur Succession Battle, Rintarou suggests thatLuna come live with him--only for this money-hungry moocher to squander his lifesavings on an estate! That's when they encounter another candidate vying for thethrone: Ema Michelle, Rintarou's former pupil. After witnessing Luna'scash-grubbing ways, Ema challenges her to see who should stay by Rintarou'sside!