Jack has relocated to Hokkaido for medical treatment, yet he remains lonely and unhappy. One night, a man on horseback rides through his window to assist him. For reasons he cannot fathom, Jack instantly knows the man's name and feels they have met before. The man, Cu Chulainn, instructs Jack to open the moonlight shadow window, which leads him to Nymphidia, the world of Midsummer Night's Dream, where the inhabitants await a new Fairy King. Based on a manga from 1978 by Ryoko Yamagishi.