After ending a long-term, long-distance relationship, Kenji Sato moves back to Japan. Back in Japan, Kenji faces major changes to his lifestyle-- Joining Japan's baseball team, the Yomiuri Giants, becoming the new Ultraman in his father's place, and "inconveniently" taking care of a baby kaiju. But as it takes a toll on his life, he turns to his ex-girlfriend and model, Akiko Hime, who guides him through those obstacles. As a result, rekindling their relationship.