RÅ«ko Kireinasora transfer into Takaaki's class. She claims to be an alien who crashed while exploring the earth. Karin orders Takaaki to spy on RÅ«ko and then to tie a UFO detector collar on the cat that RÅ«ko gives food to. While Takaaki is tying the collar on, the cat struggles and jumps into a stream. Not knowing what to do, RÅ«ko strikes down a tree with lighting so Takaaki can save the cat.