When his band votes him out due to his embarrasing musical antics, Dewey has to make the rent somehow. After intercepting a call for his substitute-teacher roomie Ned, Dewey finds himself in front of a class of elite elementary school students. Dewey decides to take on the music program and makes it his goal to teach them the gospel of rock and roll. His ulterior motive is to get them to compete against his former band for a cash prize.

When Shizuku Tsukishima, a middle school student who loves to read, meets her classmate, Seiji Amasawa, her impression of him couldn't be worse. But as she watches him pursue his dream of becoming a cellist, she's gradually drawn closer and closer to him. Seiji himself also falls for Shizuku, when he learns about her dream to become a novelist. The two promise each other that one day they'll make their dreams come true. Ten years later, 24-year-old...

High schooler Kaho Nikaido is having trouble adjusting to her new life in Tokyo. It doesn't get any easier when she is nearly hit by a truck and saved by the handsome Kanade Takahashi! Infatuated with Kanade, she works up the courage to confess. But he warns that if Kaho learns who he is, she won't want him. What could possibly keep her from this stud? Maybe the fact that he's a fifth grader?!

A schoolgirl named Shizuku, who longs to discover her true talents, meets the mysterious Seiji, a boy who is determined to follow his dreams, and the Baron, a magical cat who helps her listen to the whispers in her heart.