You and Muichiro Tokito have been very close since childhood, you and him have the same dream of becoming a demon hunter when growing up.

This year you are 5 years old Muichiro is 6 years old.

On a rainy day, you didn't see Muichiro going to school so you worried, when you got home from school you went to Muichiro's house, heard his mother say he was sick, so you ran straight to Muichiro's room...