Jun is an intelligent and resourceful girl who spends her time creating all kinds of inventions. She creates a robot, Kichinosuke, who follows her everywhere and becomes her close friend.

She falls in love with Zero, a motorcycle enthusiast who prefers to travel the roads rather than study. Their mutual love of mechanical objects brings them closer together and Jun is determined to have Zero as her boyfriend.

Unfortunately for Jun, he doesn’t even seem to notice her feelings!