During a thunderstorm, a lightning strike causes Mikan and Mrs. Tachibana to switch bodies. As the two explore what it's like to live each others lives, Yuzuhiko and Mr. Tachibana attempt to switch them back.
On Okinawa Island, a boy named Ray is determined to use a magical gift he received from a kind and beautiful mermaid to protect the island's nature and its people, no matter what he has to give.
Unico arrives in a desolate city covered by dark clouds from the local factory, where he befriends a sickly girl bedridden by the smog.
Helba organizes a party in the Net Slum and everyone is invited!
