Mayu Mitsui

Karin, a sex detective, and Nana, an assistant, have protected the peace of Shimbashi based in a Chinese-style oil beauty salon. In the city, a mysterious incident occurs in which women disappear one after another, but Karin is not so absorbed in having sex with the New York Police Department Kasumi. Nana aims to solve the case with a newcomer China Girl Hachi and pseudo-sex detectives who are a reserve army of sex detectives. As the investigation continues, the shadow of a male office worker who is envious of his female boss, as well as the super-male and female criminal association ADAM, begins to flicker.

It is difficult to stand out at a Ginza club where every hostess wants to be number one. It is competitive. One of them is a virgin and also just eighteen years old. She wants to become the number one hostess to help pay the bills for her family. She advertises herself as 'virginity for sale.' It is an auction and the prize goes to the highest bidder. She doesn't have hostess skills however. The club's manager was the number one hostess in all of Ginza and helps the younger woman.

서로의 부모님의 결혼으로 미츠키와 유야는 의남매가 된다. 미츠키는 그녀의 새 가족을 어려워하고, 유야는 그런 미츠키에게 어떻게 다가가야 할지 몰라 곤란해 한다. 어느 날 미츠키는 유야를 좋아하고 유야만이 자신을 천국으로 보내줄 수 있다고 믿는 히요리의 유령에 사로잡힌다.