The cover of the 24th volume from Toshio Sako's mystery gambling manga
Usogui is
announcing (via
MAL) an upcoming
OVA adaptation, planned for an Autumn 2012 release in Japan, as a bundle with a limited edition manga volume. The manga is also known as The Lie Eater, and has been serialized in the Weekly Young Jump magazine since 2006.

The original manga deals with gamblers who even bet their lives as ante. But to secure the integrity of these life-threatening gambles, a violent and powerful organization by the name of "Kagerou" referees these games as a neutral party. Follow Bak Madarame a.k.a. Usogui (The Lie Eater) as he gambles against maniacal opponents at games - such as Escape the Abandoned Building, Old Maid, and Hangman - to ultimately "out-gamble" and control the neutral organization of Kagerou itself. (based on
Manga Updates synopsis)