Sue, Cheryl, and Lexi are best friends. They do special things on their birthdays every year because they were all born on the same day. It's their 18th birthday now, and they're starting to lose their virginity.
在一次事故中，乔纳森的父亲乔斯塔尔爵士（由金原正史配音）被一个名叫迪奥布兰多（由齐安武配音）的陌生年轻人救了出来。这位好心的爵士接受了自称无助的迪奥，迪奥以养子的身份正式进入乔斯塔尔家族。
尹守护者（由Private Market Chun配音）来自一个历史悠久的忍者家族，他自然继承了家族血脉中流传下来的忍术，尽管他看起来既迟钝又愚蠢。阴守护者世代负责保护甘若家族，而阴守护者要保护的是甘若家族的长女甘若尤娜（中元麻衣配音）。
