Zombie-kun's body is a gag machine that breaks every rule of how bodies work, and the show never apologizes for it. He's not trying to be scary or gross, he's trying to solve a problem, and his zombie anatomy is the punchline that never stops working. If you've ever watched a kid laugh at the same joke fifty times in a row, you understand exactly what this show is.

Zombie-kun is a cheerful zombie boy whose body does all sorts of odd and comical things as he goes about his world. His organs turn out to be surprisingly practical tools for daily life. When he needs a pillow, he pulls out his stomach and blows it up with air. When he's soaking wet, he takes off parts of his body, wrings them out like towels, and sticks them back on with a glue stick. This gag comedy is made for young children and aims for laughs rather than scares, drawing its humor from Zombie-kun's bizarre abilities and his habit of ignoring common sense. Everything is drawn in a cute, cartoony style, so nothing ever turns graphic or frightening. The ONA runs to 102 episodes.