The manga centers on a young girl named Mariya, who is looking forward to start her school life in Graad University. However, something strange happens in the auditorium after a certain harp is played.(Source: Anime News Network)

In ancient times, the Titan Cronus (son of Uranus the sky and Gaia the earth) and his wife Rhea gave birth to six children. Five of them were swallowed by Cronus, and only one was saved, Zeus, hidden from Cronus by Rhea. Upon reaching adulthood, Zeus forc