Episodes 7-9 of the Soukyuu no Fafner: Dead Aggressor - The Beyond series.

Two men have just arrived at a location known as Quindecim and are unable to remember how they got there. They are immediately greeted by a young woman who escorts them to a small bar, where a bartender awaits them. They are told that they will have to participate in a game, randomly chosen by roulette, and will be unable to leave until its completion; if they refuse, the consequences will be dire. In addition to the rules of the game, the two men are told to play as if their lives are at stake. The game that has been chosen is billiards. But there's more to it than just pocketing pool balls, as the two are about to find out the outcome could mean life or death. [Written by MAL Rewrite]

Kimihiro Watanuki's life was never really normal. But in addition to his ability to see spirits, this sequel to xxxHOLiC finds him still slaving away for Yuuko, the bizarre owner of a strange shop, who promised to rid him of this ability. However, this otherworldly woman can only do so when he has worked enough to earn his wish. Such is the way for anyone who finds their way into the shop to have their request granted: a compensation equal to their wish must be paid. In this odd shop that straddles the world of the living and the dead, Watanuki finds himself doing household chores for the seemingly lazy Yuuko and her companions, while also helping out clients. Along with his classmates, supposed romantic rival Shizuka Doumeki and his crush Himawari Kunogi, Watanuki deals with the many misfortunes surrounding Yuuko's customers, as well as those that closely follow him and his friends.

The OVA will tell the childhood stories of the main characters, adapting from the first volume of Satoru Yamaguchi's original light novel. Bundled with the seventh limited edition volume of the manga.