美緒出生在優渥的家庭環境，大學畢業後家裡安排了強強聯姻，知道自己沒得選的美緒坦然接受這一切。當所有的準備進入尾聲時，卻出現意料之外的事情.....

美緒身體檢查結果是先天不孕，這對她的雙親來說是致命性打擊，本來談好的婚姻最後告吹，名為生意的熟鴨子也飛走了，雙親憤而把美緒趕出家門，終生不認這個女兒，什麼都沒有的美緒就這樣從頭開始打拼，找到穩定的工作只求溫飽。

某天她在成人網站看到露出系列後，身體異常興奮並開始自己嘗試，直到某日發現自己的好友明美也開始露出後，她決定要好好得玩弄一下明美。

Mio was born into a wealthy family. After graduating from university, her family arranged a marriage for her—a union between two powerful families. Knowing that she had no real choice in the matter, Mio calmly accepted her fate. But just as all the preparations were nearing completion, something completely unexpected happened...

A medical examination revealed that Mio was infertile due to a congenital condition. The news came as a devastating blow to her parents. The marriage that had already been arranged was ultimately called off, and the lucrative business opportunity that had seemed all but secured slipped through their fingers as well. Furious, her parents threw Mio out of the family home and declared that they would never acknowledge her as their daughter again.

Left with nothing, Mio was forced to start her life over from scratch. She worked hard and eventually found a stable job, asking for little more than enough to support herself.

One day, Mio came across a series of public-exposure videos on an adult website. She found herself unusually aroused by them and began experimenting with it herself. Then, one day, she discovered that her close friend Akemi had also started exposing herself in public.

That was when Mio decided she was going to have some fun teasing and toying with Akemi.