When an orphan encounters the eldritch demon Shub-Niggurath, the "Black Goat of the Woods with a Thousand Young" offers him one wish. His request: "Become my big sister."

Caught with a severe fever, Tobio Ikuse, a second-year high school student, was forced to miss his school trip on a luxury liner with his schoolmates. Four days later, Tobio hears the news about the disappea...

Neneko has the power of a "miko," but she avoids all people due to their reactions to the animal ears on her head. In her loneliness, she made herself a shikigami, an attractive man named Shichikage. One day...

One day a guy's childhood friend randomly grows dog ears and a tail, but what can he do?