Mami, the director of Kongo Laboratory, begs Houtaro and the others to protect the laboratory from Geryon. Protect it from Geryon? What is the relationship between Mami and Geryon...? Houtaro, suspicious of the Chemy's behavior, asks Sabimaru if it was really Kenichi who created the Chemy. For a moment, Sabimaru is perplexed, but then he reveals the truth behind the Tsuruhara brothers and Chemies. What is that unexpected truth!?