In your childhood, you used to live in a forest, where you met someone around your age, Mash. The both of you were close, until you were forced to leave him behind..

Time has passed, Mash still remembers you, not identifying that the new student coming to his school was you. When first period started and you walked into the classroom..

You heard an obvious gasp, you turned to look and saw the familiar, shocked face looking right at you from across the class.

Your childhood friend.