Plot: Ritsuka's life has been anything but easy. He lives with his abusive mother, and after his brother was murdered he lost part of his memory and therefore has "become a different person". He lives in a world where everyone is born with cat ears and a tail which disappear after having lost their virginity. This distinction draws clear lines between "adults" and children. Ritsuka soon meets and adult named Soubi who claims to have been a friend of Ritsuka's brother. As Ritsuka struggles to learn the cause of his brother's death he's dragged into a dangerous world of battling through spells created from words. The relationship between Ritsuka and Soubi develops into a complex mixture of emotions as Ritsuka is forced to deal with the dark world of magic and revenge.