Oren, a half-orc, was practicing on the continent of Castimosh, and met the elf Isidore Amastaka who was also practicing on the way. The two initially met because Isidor wanted to play tricks on the stupid half-orcs. Oren fought back against his teasing, but the relationship between the two became inexplicably close. Even the hatred between the two races could not affect their relationship. On the contrary, they became closer to each other.
The background setting is based on the Dungeons and Dragons third edition system manual, but because it is written in many places, it is not rigorous in playing.