The story takes place in Osaka, Abenobashi Shotengai, a place that has fallen behind the times, it's becoming very vacant because all of the stores have begun to go out of business. There's Sasshi and Arumi, who have grown up there and have been friends for 12 years, but the time comes for them to say goodbye to each other. The fact is that Arumi's family is going to move to a place called Akanko in Hokkaido, leaving Sasshi all alone. Suddenly strange things begin to happen and they find themselves jumping to very strange and confusing worlds. What's the cause of this? Will they ever find their way home?