When Michiru Kita sees two black rings on the necks of two boys from her school, she ends up fainting as it is an omen of death. Upon waking up, she runs into the two, Chika Akatsuki and Shito Tachiba…

Recently, people have been disappearing in Michiru's school, so Shito and Chika investigate the incident. They ask Michiru to help them, but she is more concerned about the ring that she saw around he…

Now that Michiru works for the Zombie-Loan office, she moves out of her relatives' place by using her deceased parents' estate to pay off any favors rather than letting her aunt and uncle usurp her in…

Chika's old acquaintance, Reiichirou Shiba, helps Chika and Michiru out of a jam. Shiba then tags along with the two to the Z-Loan office, where Shito instantly points his gun at him. Chika, who also …

When the office investigates a mysterious "butterfly" group, Koyomi and Michiru get mistaken as two of its members due to the butterfly symbols on their shirts. However, they get found out after Michi…

As Shito and Chika battle Shiba, a flashback is shown to show how Shiba became a zombie. During the flashback, Shiba was tired with the same monotonous life he has, so he commits suicide. However, he …

The Zombie-Loan group ends up going to a hot spring. There, Michiru finds out the pricing for zombies: the more dangerous, the more money. Also, Shito and Michiru end up being attacked by a wolf-like …

Two unexpected guests bump into Michiru, Chika's father and sister, Yuri and Momoka, respectively. What surprises Michiru more is that Chika's family is actually a very cheery bunch. Meanwhile, Shito …

The man who calls Shito a monster comes into the Zombie-Loan office and introduces himself as Toho and also as a member of the mafia. He tells them that Shito has been abducted, and that he will take …

Michiru, Chika and Sotetsu arrive late at night at a closed JRail station which is rumored to be haunted. Their aim is to seek out the Grim Reaper who like the master of the black rings, knows of all …

Chika finds Shito and they reunite to fight the twisted doctor Yoshizumi, who is absorbed into his ultimate golem creation. Otsu saves the day by putting an agent that Nogi created into Yoshizimi, cau…