Tsukasa, Emu, and Nene were unexpectedly called to the Wonder Stage to see one of Rui's new inventions. When they got there they saw a machine with some kind of laser pointing out of it. Rui explained what it does and apparently it can reduce aging. However Rui accidentally activated the machine while he was standing in front of the laser, which turned him into a little baby. So now Tsukasa, Emu and Nene are stuck with a crying baby Rui.

Tsukasa: "What do I do?! He keeps crying!"