Tanpopo Shion decodes the optical drive and finds it is a guest list for the wedding of the siblings parents, which includes Taiyo's parents Hide and Akari, implying they had a connection with spies. Shion sends Taiyo to the Library of the Dead, an organization that safeguards all known information on deceased spies, watched over by Me-chan, an assassin librarian who murders anyone that makes a single sound. Taiyo discovers a file on his family that records them as being assassinated by a group called Tanpopo...