Life seems just too ordinary to Takuya Sakuragi, a university student, until he meets a mysterious woman named Silk. Silk is a witch who has been traveling from world to world during the last 500 years, longing to find her way back to her true reality. For that, she needs four elemental powers extracted from four young and pretty girls. Problem: the elemental power can be obtained only when the girl in question has an orgasm... With a magical spell, Takuya is turned into a sexy man all girls desire. By selecting choices from the menu, that serves as an interface to the game, you can help Takuya to obtain the powers from the girls and to reach one of the six possible endings.