This science fiction omnibus depicting a doctor who "treats" robot and humanoid problems takes place in the near future, when humanoids with artificial intelligence account for 10% of the population. The main character, Dr. Sudo Hikaru, also has the undercover name Moggadeet, under which he secretly takes on illegal medical procedures. For example, for a man who inadvertently infected his humanoid wife with a computer virus when illegally backing up her data, Sudo proposes an operation to rewrite her memory using backup data. Could an existence replaced by backup data truly be said to be the same as it was before?

When Saku took in a stray black cat, she never expected that he would become the equivalent of a housekeeping life partner. But Yukichi, a giant cat who towers over Saku, is not your ordinary feline. He takes great pride in his culinary skills, and a good sale at the supermarket always gets his whiskers twitching. Saku may not have her act together yet, but at least she has Yukichi!

Akemitsu Akegami was always told by his father that "no one can live alone"...but he's sure determined. After all, his father sure wasn't saying it with the best intentions, and Akemitsu has no desire to become like that creep. But when a chance encounter with a young woman leaves him with thoughts that are all too impure, he decides to do what he must—become a Buddhist monk and renounce worldly ways. But the temple he decides to devote himself to...is full of women? And that same young woman is there, too?? What's a guy to do?

Spirits have always been attracted to Keitarou Gentouga due to his strong spiritual presence. A traumatic encounter with one had caused his right hand to be cursed, forcing him to wear a glove at all times. Now a college freshman, Keitarou is trying to live as normal a life as possible. With the encouragement of his childhood friend Eiko Houzuki, he becomes a private tutor. Since he is at the top of his intake class, his first client is the tutoring firm's most promising student, Yayoi Houzuki. To Keitarou's surprise, Yayoi is Eiko's cousin, and she possesses two pupils in each eye—allowing her to see into the spirit world and purposely seek vengeful spirits to exorcise. Ever since a car accident killed both her parents, Yayoi has been searching for the powerful spirit that kidnapped her mother's departed soul. Seeing that spirits are so attracted to Keitarou, she ropes him into helping her collect other evil spirits that will assist in her future fight. Although her quest is dangerous, Keitarou reluctantly decides to join her, even as each new spirit they meet has him questioning his resolve at every turn.