Riki Kitazawa

Astro Boy is a 5 year old robot boy, learning about the world around him from his robot parents, his mentor Dr. O'Shay, & his older human friends. He is an upbeat & positive child, but his abilities are envied by the mansion-dwelling criminal Hamegg. Hamegg enlists the help of his friends, the scientist Dr. Flau & the purple gorilla Gora, in schemes to outsmart, outdo, or even impress Astro & friends. In the end, Astro either succeeds against Hamegg or winds up working together with him.

Kakeru, a former elite runner at high school, is chased for stealing food. He is saved by Kansei University student Haiji, who is also a runner. Haiji persuades Kakeru to live in the old apartment "Chikuseisou" where he plans to team up with fellow residents to enter Hakone Ekiden Marathon, one of the most prominent university races in Japan. Kakeru soon finds out that all of the residents except for Haiji and himself are complete novices.