The Student Council candidates are told of a massive spy infiltration at Rikkyoin, and are told to capture just one of them within a week's time. To that end, Tokino's classmate Izumi Tachibana is assigned to help Chihiro's group in their efforts. But Izumi is not what she seems, and Tokino's steadfast trust in her puts her in harm's way and at odds with Kasumi, the current Vice-President.