Akamine Ryota, a student Angel, is sent to earth to complete his training.
God created angels to guard the peace in human world. Akamine Ryota is a promising senior at the angel training school, but because he lacks full control of his powers he's not allowed to graduate. Fellow students Shirogane, Aotsuka and Kurosawa are in the same predicament. Together, the four are sent to Earth - to purge the human world of evil and to finally complete their angel qualifications!

The story is about a young male prostitute named Aya and a former assassin named Chris. Aya's father murdered his mother in front of him, then forced him into prostitution. Since that time, he has always been looking for a way to inflict his revenge. Chris is just that method. After Chris saves Aya from his pimp, they form a fairly deep friendship, and Chris decides to make Aya his Last Client.

Wild Rock takes place in a prehistoric setting.
The first story is about a boy, Yuuen, who is asked by his tribal chief father to seduce Emba (a great hunter and the next chief of the rival Lakeside clan) by pretending to be a female so that they can get more food. The other stories are in the same setting, but with different characters (including the fathers of both characters from the main story when they were young).

From Storm in Heaven:

Meet Kujou Yamato, who on the outside is your average high school kid pursuing love and happiness. Except in truth he's the prince of hell, escaped to the human world to avoid a marriage he wants no part of. But hell wants him back, and picked a trio of their finest (?) to rope in him! Not to mention, his fiance isn't going to just wait around forever...

From Shi-ran:

Kasumi's day just keeps getting worse and worse. First he's dumped by a classmate, and then a strange fortune-teller shakes his world as he reveals himself to be in search of a master. And who could the lucky boy be...?