In this chapter, we learn that Hiroyuki's device was defective, and that his wife, Kataoka, had to invent a new one to keep her memories from leaking out. Hiroyuki tells us that he's glad he didn't tell Kataoka sooner, because he'd have to accept the fact that the entire world will be destroyed if he ever wants to save it. He also says that he won't be able to forgive himself for what he did, since he'll be responsible for the deaths of countless people.