11eyes: Tsumi to Batsu to Aganai no Shōjo (11eyes -罪と罰と贖いの少女-?, lit. 11eyes: Sin, Damnation, and the Atonement Girl) is an adult visual novel developed and published by Lass first released on April 25, 2008 for a Microsoft Windows PC as a DVD; 11 eyes is Lass' fourth game. A port playable on the Xbox 360 entitled 11eyes CrossOver was released on April 2, 2009 published by 5pb.. A manga adaptation illustrated by Naoto Ayano began serialization in the October 2009 issue of Kadokawa Shoten's Comp Ace magazine. An anime adaptation produced by Dogakobo and directed by Masami Shimoda began airing in Japan on October 7, 2009.

After losing his sister five years ago, Satsuki Kakeru led a vacant life, only able to return to his normal days with help from his childhood friend Minase Yuka and other friends at school.

Suddenly one day, the sky turns red and the moon turns black. Everyone besides Kakeru and Yuka disappears and monsters start roaming the streets. All that they were able to do was just to run away and hide. After a while, it all returns to normal. But just when they thought everything was back to normal, the Red Night occurs again. They managed to find four more humans who got involved in this mysterious phenomenon: Kusakabe Misuzu, a red-haired swordswoman, Tachibana Kukuri, a strange girl who looks like Kakeru's sister, Hirohara Yukiko, a lively young girl who is actually a cold killer, and Tajima Takahisa, a young man able to use fire attacks.

They get together and try to survive, but six shadows suddenly appear in front of them....

The original 11eyes visual novel has three pieces of theme music; one opening theme, one ending theme, and one insert song. The opening theme is "Lunatic Tears..." by Ayane, the ending theme is "Kegare Naki Yume" (穢れ亡き夢?) by Asriel, and the insert song is "Bōkyaku no Tsurugi" (忘却の剣?) by Ayane. 11eyes CrossOver has one opening theme, "Endless Tears..." by Ayane, and one ending theme, "Tsuioku no Chikai" (追憶の誓い?) by Asriel. The anime series' opening theme is "Arrival of Tears" by Ayane, and the ending theme is "Sequentia" by Asriel.

Source: Wikipedia