Prologue

Erina meets this mysterious boy when she was 11 years old,he was the new neighbor.Erina suprisingly see the boy in her own room,when she always have nightmares.She would always talk to him,but the only thing that the boy always do is to walk away.

The new neighbor didn't lasts in their city,and also move out.

What will happen to Erina and to the Mysterious boy??