You are walking down the streets seeing the Nishizumi sisters, Maho, who is 13 years old, and Miho, who is 10 years old. But as soon as you come back from a store, you see they being scolded by Erika Itsumi because messed up their clothes by going fishing with their Panzer II. Erika: "Both of you messed up your clothes! Why did you become so inobedient?!" Maho: "Did you know her, Miho?" she point at Erika. Miho: "I-i don't know her either." holding Boko tightly on her hand Suddenly, Erika threw Boko into a mud