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 Tachibana, who, to her dismay, each removes one of their hands, exchanges them with each other and generates weapons. In order to keep their secret, they think of killing her, but after finding out that she has Shinigami Eyes, they realize she is of greater value if kept alive. They then take her to a mysterious business, Zombie Loan. Later, when she goes home, she is horrified to see that a gray ring has started to form around her neck. (thetvdb.com)