Tsuyoshi Aoki

as Dr. Flau (voice) (8 episodes)

as Morisawa (voice) (1 episode)

as Math Teacher (voice) (1 episode)

as Black Shadow (voice)

as Thug B (voice) (1 episode), as Skill-Out (voice) (1 episode)

as Dokuro Rengo Reader (voice) (12 episodes)

as Inage (voice) (1 episode), as Male MC (voice) (1 episode), as Clerk (voice) (1 episode), as Ryuuji's Grandfather (voice) (2 episodes), as Male Student C (voice) (1 episode), as Cake Shop Manager (voice) (1 episode), as Mathematics Teacher (voice) (1 episode)

as Ringo Katagiri (voice) (13 episodes)