Onigawara Yuutarou is your average high-school kid, a bit on the quiet, kind-hearted side. One day, he walks through an arcane ritual and ends up summoning a demon, Slayer, who will grant him tree wishes. Horrified by Slayer's violence, Yuutarou wishes for Slayer to stop using his demon powers, turning him into a human. Now Slayer's stuck with Yuutarou in a perfect personality mismatch, and to top things off, if one of them gets hurt, so does the other.

A long time ago, in a certain world, the evil magician Aval was thoroughly defeated by a brave man Ruldo, who carried "Sword Breaker". Unfortunately, Ruldo was banished by Aval's curse into a different world. Now, will the call for a hero bring Ruldo back into his original world once more?

From Eternal Blue:

Basically, this manga follows Hibino Hareluya as he tries to "conquer the world" by dealing with the everyday punks on the street. Always ready to fight and always winning his fights, he just finds himself in more and more trouble. Along the way he surrounds himself with friends who are all very strong in their own unique way.

It is the manga Umezawa made before his very succesful follow-up BOY and which tells of the adventures of Hibino, delinquent son of God. God gets enough of his son's behaviour and sends him down to earth to better his life and test him. The outcome of this will determine the future of the world, because God won't have his son succeeding him if he doesn't better his life and will end humanity if Hibino fails.

Detectives Aitou and Reiko are reprimanded because of their unorthodox interrogation techniques, and then they walk into a bank robbery!

Reiji and Kasuga head out to Tokyo to become the "Gods of Rock," but they seem to always attract trouble. On their way, Hayama Ryo and Fujii Ran join them in their quest.

The day after he finds himself dumped by his girlfriend, Sorayama Shun recieves a letter... from himself? The letter was from Shun 25 years later for his future self. The letter reminds him of the time when he dreamed of owning a Countach and being a successful professional racer. With loads of luck and his ambition to make his childhood dream come true, he finds himself as a new owner of an LP400 Countach.