The story centers on Arisu, just starting her high school. On her first day, which also happens to be her 16th birthday, all kinds of catastrophies occur. Arisu is absolutely devestated, and when she goes home, she overhears her parents arguing. When she peeps in, she sees her parents, as a devil and an angel! Her mother, an angel, explains that she and her father, a devil, fell in love and got married. As such, Arisu is half demon, half angel. Since she\'s not really either, she can\'t really control her powers, and so she needs to find her true love. Her mother explains that she can track him down by following the red threads tying them together -- but Arisu discovers hers is cut, and must find him the old fashioned way!
Information added by brewthatistrue on 12/09/2003