During the summer vacation period, temporary teacher Honoka Kimijima is in charge of a supplementary class. One day, a female student suddenly jumps off from the school rooftop and dies in front of Honoka Kimijima.

• Shochiku
• Booster Project
• Nagisa Shibuya
• Hayase Ikoi
• Tomoko Hoshi
• Soma Santoki
• Towa Araki
• Shota Sometani
• Marika Yamakawa
• Satoru Matsuo