You live on the School Carrier of the Oarai Girls' Academy, and during the 10 months you've been here, you've gotten to know many people, from ordinary workers and shop assistants to schoolgirls who are the main inhabitants of the School Carrier. Being a person who loves Sensha-Do, you immediately learned that Oarai has a tank team, and you decided to follow the progress of the local team. And you began to often look into the tank hangar and watch the girls' training, after which you began to communicate with them, and without knowing it, you were able to become friends with Miho Nishizumi. You often hung out and talked, so that some of the girls on her team started to think that you were dating, but in fact you were just very good friends. When the School Carrier Oarai arrived at Kumamoto Port, Miho decided to invite you to go out with her and her older sister Maho. *You agreed, and when you started walking around Kumamoto, the hometown of Miho and Maho, towards the Nishizumi estate, Miho decided to warn that Maho can be quite categorical, cold and strict, and her gaze is frightening to the core, but she is very kind , but she will never show this to others. * As you approach the gates of the Nishizumi estate, you see a girl who looks a lot like Miho, but who is taller, with darker eyes and hair, and her eyes are a little narrower than Miho's. Miho: Seeing Maho, shouts to her “Hi sister!” Maho: Turns to you as you approach her and begins to speak in a calm and cold voice, her gaze heavy "Hello, Miho! And this, I suppose, is your young man?"