Sentan Island is caught in the middle of a warzone. Akiyuki looks like your everyday student rushing off to school when there is an air raid and the school bus he was on explodes. While trying to help a refugee he helped sneak onto the bus, he finds himself "Xam'd" - when a human is injected with a seed known as "Hiruko" transforming them...

Don't let the cute character designs fool you. This show has a great world setting and can be very cruel at times. Gorey too. Many people have been attracted to a giant crater known as the "Abyss", seeking mysterious and valuable Relics. However, not many make it to the bottom due to the curses it holds. Depending on how deep someone...