The whole Sanctuary was misled into danger due to the civil war instigated by the Gemini Gold Saint, Saga. Our story begins right after the end of those events... This is a story of the girls protecting Athena. These are the records of love and fierce fights they meet while opposing destiny on their way to maturity... (Source: MangaSeven)

In the near future, technology has made a few leaps and bounds, and videophones and constant wireless internet access are available to everyone. However, it would seen that the government has been careless and a skilled hacker was able to break into the national information archive. Using the data held there he creates the Platonic Chain website for people to discover information about themselves and their friends. Words start to spread quickly that there is a site that enables you to look up anything. Coincidentally, three young girls, Hitomi, Rika, and Kanae, are able to access the site.

Nanako is a an inept apprentice nurse to the brilliant young Dr. Kouji. Now for some reason, Nanako is always being targeted by various elements which makes Nanako wonder if she has done anything wrong. But there are certain secrets to Nanako's past that only Dr. Kouji and his family know about.

Kaoru is a 17-year-old virgin who has an S&M fetish. He has always dreamt about an SM relationship with his childhood friend Nana, who is looked upon as perfect and is always the target of boys' eyes. Their relationship has somewhat deteriorated through the years, due to them hanging out with different people and because Kaoru is not taking his education too seriously. One day though, Kaoru's mother gives some of his S&M toys to Nana for safekeeping - Nana finds the leather one-piece that Kaoru bought and tries it on but accidentally locks herself in it and doesn't have the key! Kaoru frees her of the one-piece, but then Nana realizes she may like Kaoru's hobby more than she thought and subsequently the two of them start engaging in so-called "breathers". These breathers are intended to relieve Nana of stress, stress originating from her attempts at keeping her grades and her name perfect.