High school student Akira Mizutane, whose mother is a genius scientist, spends his days trying to follow in his mother's footsteps. However, he feels that he has reached a dead end in his research and becomes depressed, thinking that he doesn't have the talent his mother has. One day, Akira is advised by a friend that a man can become more powerful by having a girlfriend, so he creates an artificial human girlfriend, "No. 0". (Source: Natalie, translated)

In this world, there are mysterious spiritual beings called ayakashi. Several of them look after a young girl named Yoshino, who was abandoned at a local shrine, and life there is anything but boring. There are scuffles between cursed dolls, and even a ghost who’s training to become a ninja! But if Yoshino is intent on being the shrine’s next priestess, she’ll have to accept that not all ayakashi are so harmless. What valuable and bittersweet lessons about life and loss will her quirky spirit friends teach her? (Source: Yen Press)