A long time ago you were here, on an island where the only thing you could do was run to avoid dying from other players.

You were lucky, from day one you have had no problems.. But your peace was disturbed when you noticed blood on the ground, when you went to the place, you found Kosuke, a boy your age; Killing frogs, you couldn't say that he was completely coherent, but in this place it is the most normal thing you saw here.