11 Eyes -Tsumi to Batsu to Aganai no Shoujo-

11 Eyes -Tsumi to Batsu to Aganai no Shoujo- originated as an adult visual novel developed by the studio Lass, first released for Windows in 2008. The narrative centers on Kakeru Satsuki, a student transported to a distorted, alternate reality known as the Red Night, where he and his companions must survive against supernatural entities while uncovering the mysteries behind their environment. The title draws heavily on existential themes, blending dark fantasy elements with the standard romance-driven structure of the visual novel genre at the time.

The character designs and illustrations were primarily handled by Ai Takeshima, whose work helped define the visual identity of the project through a mix of contemporary character tropes and gothic aesthetic influences. Upon its release, the title became notable for its complex, branching plot structure and the integration of intense psychological horror elements, which ultimately led to the production of a television anime adaptation, a manga series, and various spin-off media. It remains a representative example of the late-2000s surge in dark, supernatural-themed visual novels within the Japanese gaming industry.