CG制作公司“studio delta”的工作人员大森道江（上田龙雄饰演）是一名性依赖女性，有五个朋友。她认为“性是一种自由的爱好”，但相反，她爱上了在一家商业公司工作并有女朋友的阿俊（矢野英久饰演）。她对单恋感到无助、悲伤和空虚。
重新整理好心情的由加里打算把对方留在这里的最后一样物品——家中的钥匙还回去，“可是当时得到钥匙时的心情，即使到现在都能记得，就像是拿到了打开通往世界之门的钥匙一样……”3年前的甜蜜的圣诞节在脑海中清晰起来。
Kyuuketsuki Miyu is a disturbing four episode long anime series about a young immortal vampire princess named Miyu and her protector/servant/best friend and more Larva. In four episodes, a nosy spirit-hunter Himiko Se chases the elusive Miyu because she is very curious about Miyu's past. Miyu, she discovers, is the guardian of the door between the two world: One of the Shinma ("shin" god; "ma" ghost/demon) and the one of our world. The Shinma wake from their sleep and disturb the lives of the Humans living above. Miyu and her servant (?) Larva hunts down these strange beings. However, Miyu is one of the Shinma herself and dislikes her duty. In the four episodes, Himiko Se discovers her link/destiny with Miyu...
