×××HOLiC ~Watanuki no Izayoi Sowa~ (×××HOLiC 〜四月一日の十六夜草話〜) is an Adventure game, for Playstation 2, developed by Tenky and published by Marvelous, which was released in Japan in August 9, 2007.
The protagonist of the series is Kimihiro Watanuki (四月 一日 君 寻 Kimihiro Watanuki), a high school student who is constantly haunted by monsters, ghosts and spirits who are magically attracted to him because of his blood. These monsters are invisible to people without power, so other people brand him as weird or crazy when he is haunted by the spirits. Everything changes when he goes into a store that sells wishes.
Official website: http://mmv.co.jp/special/game/ps2/xxxholic/