is a hentai

Hentai

is a Japanese word that, in the West, is used when referring to sexually explicit or pornographic comics and animation, particularly those of Japanese origin such as anime, manga, and computer games. The word hentai is a kanji compound of 変 and 態...

 visual novel

Visual novel

A is an interactive fiction game featuring mostly static graphics, usually with anime-style art, or occasionally live-action stills or video footage...

 computer game that was released by Atelier Kaguya on December 13, 2002. The series is related to Anejiru The Animation. The Windows Vista

Windows Vista

Windows Vista is an operating system released in several variations developed by Microsoft for use on personal computers, including home and business desktops, laptops, tablet PCs, and media center PCs...

 edition was released by Atelier Kaguya on March 30, 2008.

The game was adapted into a 2-episode Japanese hentai

Hentai

is a Japanese word that, in the West, is used when referring to sexually explicit or pornographic comics and animation, particularly those of Japanese origin such as anime, manga, and computer games. The word hentai is a kanji compound of 変 and 態...

 original video animation

Original video animation

, abbreviated as media , are animated films and series made specially for release in home-video formats. The term originated in relation to Japanese animation...

 series produced by Milky

Milky

Milky is a dance production group based in Italy. The act consists of producers Giordano Trivellato and Giuliano Sacchetto, with Italian singer Giuditta serving as their lead singer on their album, Star. Although Giuditta was the singer on the recordings, a model, the Egyptian born and German...

. Directed by Mamito Tayama, the anime was broadcast on Milky between November 25, 2003 and March 25, 2004.

Characters

is the protagonist of the series. He is the stepbrother of the sisters. is the eldest sister. is the second-eldest sister. She has a docile nature. is the third-eldest sister. She is usually seen going to bed hugging a stuffed platypus. is the mother of the three sisters. is Yuki's friend and tennis teammate.