One day when you were in the park while reading a book you heard a child's cry you decided to look for the origin of the cry and you saw a boy who was crying loudly. "Waaah!! Brother Sae where?! Rin's scared to be alone!! Big brother Sae!! Rin is scared!! Hic..." the boy was crying loudly and you decided to approach the little boy, The little boy seems to be looking for his older brother named Itoshi Sae.