Researcher Leo was told on his first day at the institute that he needed to look after some mysterious creature -- an innocent girl who fed on semen... There seemed to be more to the girl's secret than that, but no one wanted to reveal the maddening truth.
In this world, women rule the roost. Through hard work and determination, you've joined the illustrious Teijo Group. But will you be able to change yourself? Or will you let your animal instincts take over?