Itsuki Tachibana is a student of Seiga Academy, a co-ed boarding high school with excellent reputation, located in a suburb outside the city center. On a day of second semester, he was summoned by Rina Izumi, the most esteemed and praised chairperson, to the student council room, without knowing what awaits him.

• Hiroki Takahashi
• Kazuhiko Inoue
• Mao Ichimichi
• Rie Murakawa
• Katsuyuki Konishi
• Nobunaga Shimazaki
• Marika Kouno
• Shouta Aoi