Key Sugisaki, the male lead of Seitokai no Ichizon, thinks he’ll get to enjoy his special harem life in the familiar student council room again today. But when he arrives, everything seems suspicious! The president, Kurimu Sakurano, and the others are nowhere to be found. Once he enters, he can’t leave the room. A mysterious gray fog hangs outside the windows, and his bookshelf is suddenly filled with light novels, manga, and discs he’s never seen before. There’s even a red button on the president’s desk that shouldn’t exist, and his mind is full of memories that don’t belong to him! Is this an angel’s joke or a devil’s prank?