Rags Town is the garbage dump of Japan. The place where people who want to forget their pasts run to. In this town, where the rules strictly forbid asking about the past or getting to know people, there is small detective agency called S&A Detectives. The story revolves around Ayamana, the inseparable pair of misfit wannabe detectives, the case Manami takes on impulse, and the trouble that arises from it. On the case they find a woman who is abnormally hot, and who is being chased by a bunch of women with guns. After being dubbed Sara, the detectives try and figure out just what is going on with her. At the same time, all over town teenage girls are burning up and turning into glass. The government is covering everything up, but the detectives, as well as a nosy reporter and the local police, are determined to find out what is happening.

Ninja... Ninja were... merciless demi-gods, ruling Japan with their karate in the age of ninja tranquillity. But, "some" committed a forbidden form of hara-kiri storing their souls at Kinkaku Temple for future resurrection. Their lost history was falsified and concealed and the truth about these ninja was long forgotten. Now, in the future where the universalization of cybernetic technology and electronic networks are God, suddenly, sinister ninja souls, resurrected from thousands of years past are unleashed on the dark shadows of Neo-Saitama. Fujikido Kenji, is a salaryman whose wife and child were killed in a ninja turf war. In a brush with his own death, Fujikido is possessed by an enigmatic ninja soul. Fujikido cheats death and becomes Ninja Slayer. A Grim Reaper destined to kill evil ninja, committed to a personal war of vengeance. Set in the dystopian underworld of Neo-Saitama, Ninja Slayer takes on Soukai Syndicate ninjas in mortal combat.

Three years have passed since the bombing of Hiroshima and Gen is now a fourth-grader. Hiroshima is still a ruin, and Gen must scrounge for scrap metal to help keep himself and his remaining family fed, but at least commerce has returned to the land. As his mother gradually grows ill from radiation sickness, Gen and Ryuta befriend a group of orphans led by a tough-nosed older child and including a girl who still bears ugly burn scars from the day of the bomb. An old man suffering from depression is also drawn into the group as they come together to support each other and form a makeshift family. Reality is still harsh, however, as many orphans still die lonely deaths and the grim reminders of what happened linger everywhere. (Source: ANN)

The OVA episode revisits the primary matches from the spring tournament and features interviews with players.