"Who is the Key" is the two hundredth and twenty one chapter in Ahiru no Sora.
Chapter Summary[]
Characters[]
- Madoka Yabuchi
- Momoharu Hanazono
- Yasuhara Shinichi
- Youko Kokubu
- Ryuuhei Nabeshima
- Kenji Natsume
- Tanaka Yoshio
- Kaname Shigeyoshi
- Konno Michiro
- Chiaki Hanazono
- Nao Nanao
- Sora Kurumatani
- Kouta Igarashi
- Kazushi Kashiwagi (flashback)
- Sakurai Kazuyoshi (flashback)
- Tamo Yukio (flashback)
- Tomohisa Kurumatani