For things happened in the previous story Mizutani-kun comes to get his heart pounding each time he sees Kotomi-chan. This time he happens to Kotomi-chan's nudity...
Revealing a certain ingenious tribe's strange custom that rarely born "man with a feature of god" is required to have sexual intercourse with virgin girls for the tribe's prosperity...
Because of the "Genetic Match-Up System" Karin has got in a physical relationship with her gofer boy. Even during a training camp she has to obey him...