Amano Jyaku is searching the earth for a being known as the "Overfiend", who is scheduled to appear and create a new eternal paradise. He thinks he's found the dormant being in a Japanese college student, but a demon warrior is intent on preventing the young man from reaching his potential. Will Amano be able to protect his discovery? Should he? After all, if the Overfiend is here to create a new world, what's going to happen to this one?

由成人漫画改编的18禁OVA
喜剧类里番，尺度不大
详见维基百科(日文)：

一日，致力于研究化学X神秘物质的ユートニウム博士跟助手同时也是他儿子肯发现了一种新物质Z。这种物质发射出一道白光跟一道黑光，在东京城中放出。
这道白光打到了初中一年级生赤堤ももこ、豪徳寺みやこ、松原かおる这3个女孩身上，于是，3个飞天小女警诞生了！！
与此同时，那道黑光打到了东京动物园里。一座猴子山上的猴子变成了飞天小女警们的宿敌。小女警们将怎样保卫这座城市呢？……

三年前的那场事故 使得凉宫遥以及鸣海孝之的人生发生了巨大的变化。
遥昏睡了整整三年 即便是苏醒后的短时间内 记忆也一直是处在混乱状态。
孝之因为遥的事故而深受打击 过着茫然自失的生活。
但是全靠了速濑水月献身性的努力 虽然几经周折但还是振作了起来
现在在Family‐restaurant——Skytemple打工中。
遥也找回了记忆 病情也康复了 马上就能够出院了。
随后在遥出院的当天 孝之以及好朋友平慎二
遥的父亲宗一郎以及遥的妹妹茜一起 前往医院迎接出院了的遥。
但是在那里 并没有出现一直支撑着孝之 甚至想到过了结婚的水月的身影…

Legend has it that the human race is not the only dominant civilization living on Earth. Two other races exist in this world: the Makai (a demon race) and the Jujinkai (a half-man, half-beast race). Once every 3,000 years, a supreme being known as the "Choujin" (Overfiend) will emerge and bring balance to all three realms on Earth. In present-day Japan, after 300 years of endless searching, a Jujinkai named Amano Jyaku has discovered the presence of the Choujin inside high school slacker Tatsuo Nagumo. But now, Amano, along with his sister Megumi and their sidekick Kuroko must protect Nagumo and his new girlfriend Akemi Ito from the Makai, who believe that Nagumo is not the Choujin, but an evil entity bent on destroying all living beings on Earth.