I have only one goal: revenge towards the bully. "The ability to browse through all the world's books within my mind." The boy who was labelled as trash, Omiya Hoshikuzu deciphered the method to conquer the world from the world's books. He then headed towards the bully who came to be the hero. The boy who got transferred to another world along with his bully, will stop at nothing to fulfill his goal.

Moriko and Atsuki are cousin. Atsuki's parent have to go to work abroad, so he has to live with Moriko's family and now he works as a Biology teacher in same school Moriko attends. Atsuki is really good looking, and everyone is jealous about Moriko that she lives in the same house with him. However, regardless of his good looks, Atsuki has some odd quirk that can make people's speechless sometimes. He is quirky, random and simple minded but he is also intelligent at the same times. Atsuki loves the story of Sherlock Holmes. He likes anything that sounds exciting and intrigue him as an interesting case, this always cause him, Moriko and Moriko's freind-Hikono to get involves in mysterious cases.

Kiryu Umon is a man disowned by his own father, forced to live as a vagrant, until his supposedly-estranged father suddenly calls him back. Now he finds himself undertaking a mission for the shogun Yoshimune! His job is to help deliver something from Nagasaki to Edo… But as factions collide, this will mark the beginning of a tumultuous journey! (Source: Sunday Webry, translated)

A yakuza named Harada tries to help a woman giving birth but dies on the process. When he opens his eyes, he learns that he is reincarnated into the newborn baby, and thus begin the problems for Harada and "his" parents.