Using a game by Alice Soft. Kyouya is really a teacher to Andrude Ocean School, and this is a substantial ocean city. Kyouya saved Kisaragi Miyu 36 months ago. Ever since then, she's were built with a secret yearning to him. Her twin sister, Yumi, an android made by their dead parents is helping Miyu fulfill her love, but her thought is wavering between Kyouya and her sister, since Miyu's memories are implanted in her own...

The main character, is very sweet and from time to time modest young girl. In the beginning of the story, gets a maid to his best friend who is her secret love. To please him she does absolutely all the work peculiar to a maid and in addition satisfies sexual needs of his master. And the guy treats her as an object of desire and does not take it apart as his sex toy.