—I believe in that smile. Even if you don't have a soul—

2105 AD, Japan:

The humanoid androids hiEs became part of people's lives, handling things humans could and couldn't do. Endou Arato, unlike his friends Kenko and Ryou who hate hiEs, felt sympathy for hiEs which are supposed to be just objects.

One night, Arato suddenly gets assaulted by mysterious falling cherry blossoms that make hiEs and machines run havoc. Will the cornered Arato be saved by the mysterious hiE Lacia....