Dark Prison of Scattered Flowers.6 months have passed, and one fine day Thoth suddenly declares that mid-term exams are in 3 days, shocking Yui. They attempt to study together using Tsukito's perfect notes, but a Yui has been experiencing strange dreams of Apollon's past, while Apollon has been losing sleep as well. From the dreams, Yui finds out about a woman named Cassandra that Apollon loved so much to the point where he gave her a part of his divine power to see the future, until she committed suicide much to his anguish...