
A 12-episode anime adaptation of the shōnen-ai fantasy manga by Yun Kouga was made by J.C. STAFF, and first aired in Japan from April 2005 to June 2005. The episodes covered approximately volumes 1-4, due to production starting in August 2004 -- about 4 months before volume 5 was published. Because the source material hadn't finished its serialization, and with a limit of 12 episodes, the anime adaptation has quite a few differences. The most notable is the series finale, which was written specifically for the anime and left the storyline open to the possibility of a future sequel.
On his first day at his new school, twelve year-old Ritsuka Aoyagi meets a mysterious twenty year-old man named Soubi Agatsuma. He claims to be a good friend of Ritsuka's brother, Seimei, who was recently murdered, and the suspicious organization called 'Seven Moons' (, Nanatsu no tsuki?) may be responsible for the death.
As Ritsuka quickly finds out, Seimei and Soubi acted as a pair involved in spell battles. Now Soubi is Ritsuka's 'sentoki', or fighter, and Ritsuka is his 'sacrifice'. Together, they challenge the organization to find out the truth behind Seimei's death and the reason for Ritsuka's amnesia, but end up forming an intimate bond with each other as they unravel the mystery.
summary credited to wikipedia.org

right... rape-able nga ang ritsuka!
