Toru Kumagai (4 Episodes)

Naoko Masaki (4 Episodes)

Akemi (4 Episodes)

Oyamada (4 Episodes)

Sakai (4 Episodes)

Izawa (4 Episodes)

Minowa (4 Episodes)

Nakao (4 Episodes)

Tae [Kumagai's former student] (4 Episodes)

Tomomi (4 Episodes)