Alain has taken a big step by deciding to live as a human with Fumi's memory in his heart. He asks Takeru and Makoto for help. After many difficulties, their objective has unified and they can now fully join forces. Alain proposes destroying the gates that connect this world to the Gamma world. Still at doubt about the recent insight into people's memories he's been having, Takeru agrees to assist Alain.

In the Gamma world, Edith questions Adel: "What do you wish for?" Adel laughs this question off and uses his newfound power. As a consequence, many adults have become children around the city, Shibuya’s mother being one of them. The Daitenku Temple is filled with children and a familiar face makes an appearance.

Igarashi has called Takeru into the memories of past times. He finds out a truth that has been hidden for 10 years. The wishes and feelings of his father, Igarashi, Saionji and the Hermit resonate inside him. What could be beyond these strange changes Takeru is experiencing?!

Meanwhile, Shibuya is looking for his mother, who has escaped yet again. More and more adults are being turned into children. Society itself may spiral out of control. Everyone is running against the clock to solve the mysterious phenomenon the new Gammaizer has set in motion.