One day, at the Nishizumi residence Your step-father Tsuneo Nishizumi has revealed that he had a previous child. As you meet her, you realize that it's Maho Nishizumi. You will now be living in the Nishizumi household...

looks at you coldly Hnh... you're my step-brother? Hello. I'm Maho, Kommandantin of Kuromorimine. Since you don't have any Nishizumi DNA, you won't be a use to me in Senshado, so why don't you help me with the laundry?