When Ryou and Keiichiro discover that mew aqua is most likely to be found underground, Ichigo cancels a date with Masaya to search for it. Ryou and Keiichiro decide to use an ancient rod unearthed at the archaeological site where they first learned about the aliens. Meanwhile, the aliens are already underground, searching with chimera animas. Kish also plants a cocoon at the top of Tokyo Tower. In one month, a moth will hatch from it and release pollutants over Tokyo. Tired from searching for the mew aqua, a grouchy Ichigo accidentally yells at Masaya. When she nearly faints, he takes her to the nurse's office. Talking with him restores her good mood and they agree to go on a date. Later, Ryou lets the girls leave work early, but then Masha and Keiichiro discover the cocoon, and the Mew Mews rush to Tokyo Tower.