Miki Maruyama

Tanaka-kun is always in a state of blissful lethargy, with a desire to be as listless as possible. Now, if only his responsible classmate, Ohta, would leave him alone to laze in peace!

Astro is a robotic boy created by Dr. Tenma to replace his late son. When Tenma destroys his laboratory and shuts down Astro the Ministry of Science revives him, and tries to give him a normal life as a 6th grade student that occasionally helps keep renegade robots from causing harm.

Koyuki Tanaka's boring life is changed after meeting Ryusuke Minami, a local musician with a bad attitude, who introduces him to foreign music.