Slowly, Summer Team A and the other group begin to cooperate, although there is still some mistrust between them. Together they successfully devise a plan to get rid of the bat colony using music made by Haru playing Die Fledermaus. They form an uneasy truce and Summer Team A also help treat the injuries of the others, including Kurumi Shikano who is pregnant with Ryusei Ogiwara's child. When Ango discovers that Hana is the daughter of Professor Takashi, he tells everyone about the program which created the Summer Team A, and how he protected his younger friend Shigaru...