The story revolves around the members of the “Earth Defense Club” aka the “Do Nothing Club” at Binan High School. One day, the club members are soaking in a hot bath together when all of a sudden a mysterious pink wombat appears out of thin air! The wombat asks the members to lend it their help to protect the Earth. At school the next day, each of the club members receives a magical bracelet enveloping them in a dazzling light.