Although Aki Light looks like a schoolboy he's really a robot. He lives with his creator, Dr. Light, as his son, and he has a human sister called Suna. Their home is Silicon City, where humans and robots happily coexist. However there are rogue robots who are continuously on the attack. Luckily Aki is also Mega Man, and he keeps the city safe. Fighting alongside him are Mega Mini, a miniature robot who lives in Mega Man's forehead, Suna, and their pet robot dog, Rush.