Special thanks to BL for telling me.ANN wrote:The August issue of Kadokawa Shoten's Comp Ace magazine will announce on Friday that a television anime adaptation and a manga of Lass' 11eyes -Tsumi to Batsu to Aganai no Shōjo- fantasy adult computer game have been green-lit for this fall. The staff and cast of the anime version have yet to be announced.
The story centers on Kakeru Satsuki, a boy who has been mourning the loss of his last remaining family member, his older sister, for the past five years. Satsuki, his childhood friend Yuka Minase, and four other Kōryōkan Academy schoolmates are suddenly transported to the world of "Red Night," where a giant black moon hangs over the skies. The six can only return home after dealing with the six black knights of this alternate world.

He also said that it looks like the CH one...
Meh, hopefully they won't rape the story like it happened with Chaos;Head.
