A 7-day contract. Princess Kachua of the dragon country 'Dragondara' decided to accept a certain bet proposed by the invading demon Ginyor to save the people of the kingdom and her parents, King Lawrence and Queen Nina. The bet was that if she could complete all of Ginyor's orders within 7 days, the demon army that had attacked and conquered the kingdom could be forced to retreat. Defeated in battle and having her sword broken, Kachua had no choice but to accept the bet.