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It starts off in the past when Kotarou first asks Iku to become a teacher at his school. Once there he meets Tsukiko for the first time and it shocks him that he sees a resemblance between her and his sister Yui. Iku then reminisces on his childhood with Kotarou and how neither of them can get over the loss of Yui.
Kenichi Suzumura
Tsubasa Amaha (voice)
Daisuke Hirakawa
Hayato Aozora (voice)
Daisuke Kishio
Naoshi Haruki (voice)
Akira Ishida
Kotarou Hoshizuki (voice)
Soichiro Hoshi
Homare Kanakubo (voice)
Jun Fukuyama
Azusa Kinose (voice)
Hiroshi Kamiya
Ryuunosuke Miyaji (voice)
Koji Yusa
Iku Mizushima (voice)
Tomokazu Sugita
Kanata Nanami (voice)
Yuichi Nakamura
Kazuki Shiranui (voice)
Hikaru Midorikawa
You Tomoe (voice)
Daisuke Ono
Suzuya Touzuki (voice)
Fumiko Orikasa
Tsukiko Yahisa (voice)