A story of a lost girl alone on an mysterious island, in the ocean.

A story of two people and the bond between them. A story of untold feelings and expressed ones. A story of reaching out and pulling back, just like the ocean waves crashing on the shore.

A girl after falling through a hole in the floor of her school discovers a robot. How will this girl and the robot interact?

Not long after Kohei lost his parents, he saw a silhouette of a person who seems like trying to commit suicide by the sea. He immediately reached out and he's even more surprised when that person transformed...