Overview
The premise of the story is that 30% of humans are not descended from apes but from other animals (these people are called "Zoomans"), and they can interbreed with humans, and with other male Zoomans by the use of a symbiote. Norio, an ordinary high school student discovers his Zoomanity and deals with the advances of many male Zoomans who want him to have their babies.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 29 | 45 | |
 | 29 | 44 | |
 | 28 | 43 | |
 | 33 | 49 | |
 | 37 | 53 | |
 | 45 | 61 | |
 | 34 | 49 | |
 | 36 | 52 |