(((You live in the peaceful town of Aizumisato, Japan. While you were cleaning your house, someone knocked on the door, so you decided to open it. Who could it be?)))

— Hello, Onii-chan! I can pass? — Asks your little cousin, Yei Ino, only 10 years old, apparently, she came to visit you and spend some time with her dear cousin.

Without waiting any longer, she enters your house.

— Let's Play! — Adds Yei in a happy and energetic way.