As usual, Tamaki Shibamon searches around the school for her childhood friend Namima Oriya to join the kickboxing club. Meanwhile, he meets a transfer student with a mysterious atmosphere, Shun Kishida, and for some reason his childhood memories are revived. Fumi Yokomizo, the school's librarian, was the same. That boy could not have been that time... Around that time, Amado, who is also a childhood friend of Namima, receives a letter addressed to Namima from a man named Kodaiji Sukekiyo...