It was serialized in Kodansha's Monthly Afternoon magazine from 2001–2002 and published in four volumes.

Shiro is a construction worker, tired of the usual daily routine of his job; he hopes that something will come to awake him from the monotony of his life, and his wish is answered when a young girl named Lucy, falling naked from the sky, enters his life.

After that he meets a stranger who claims to be his friend, and learns that he had his memory voluntarily erased, he knew Lucy from before, and to find a way to solve the puzzle he has to find five old friends, who have had their memory erased just like him.

Written and illustrated by Shohei Manabe, the series began serialization in Kodansha's Monthly Afternoon magazine in 2001.

[3] In Manga: The Complete Guide, Jason Thompson wrote the story "has the feel of a dream" and praised the artwork for matching the setting.