• 
  Eri Suzuki

   Hikari Kohinata (unknown episodes)
• 
  Kikuko Inoue

   Kino Kohinata (5 episodes, 2016)
• 
  Shizuka Itô

   Mato Katori (12 episodes, 2016)
• 
  Yurika Kubo

   Advisor Cha (12 episodes, 2016)
• 
  Ai Kayano

   Futaba Ooki (12 episodes, 2016)
• 
  Saori Oonishi

   Ai Ninomiya (9 episodes, 2016)
• 
  Yuichiro Umehara

   Makoto Ninomiya (9 episodes, 2016)
• 
  Aya Suzaki

  12 episodes, 2016-2018

• 
  Ai Yamamoto

  Kokoro Misaki
• 
  Hiroki Takahashi

  Mamoru Towano
• 
  Minori Suzuki

  Girl
• 
  Erino Hazuki

  Akane Mizunashi
• 
  Yoshihisa Kawahara

  Nikku-sensei
• 
  Chiwa Saito

  Chizuru Himeno
• 
  Ai Kakuma

  Kotori Misaki

• 
  Eiji Miyashita

  Chokomin-sensei
• 
  Miyu Irino

  Peter
• 
  Fukushi Ochiai

  Tawashi-kun
• 
  Teruyuki Tanzawa

  Momo-chan-sensei
• 
  Toshiki Iwasawa

  Baseball Club Member A