A Battlefield Where the Gray World is Cut to Shreds (灰色の世界を切り裂く修羅場 Haiiro no Sekai o Kirisaku Shuraba) is the sixth episode of the anime series, Ore no Kanojo to Osananajimi ga Shuraba Sugiru. The originally episode aired on January 6, 2013.
Himeka joins the club and while undergoing a "test", they are caught by the hall monitors. As the situation progresses, Eita and the others are forced to clean the pool as a punishment. In the meanwhile, Mana shows up and asks Masuzu to return to their home in Sweden and in the meanwhile, ridicules Hime regarding her delusions. After some time when her sister decides not to leave the school, Mana analyses the situation and gets out of the place. Later, a red-haired hall monitor named Ai shows up and announces that the club is going to be shut down.