4人はそれぞれウソをつく

金田朋子
Maskuma (voice) / Maskuma (Girl) (voice) / Fuku-chan (voice) / Space Monster Che...

小野大輔
Head of the Research Institute (voice) / General Manager (voice)

上田燿司
Brian-sensei (voice) / Poppyopip-Poppyoppyopipop Alien (voice)

大塚芳忠
Narration (voice) / UFO (voice)

田中ちえ美
Rikka (voice)

村上奈津実
Chiyo (voice)

佐倉綾音
Sekine (voice)

潘めぐみ
Tsubasa (Tsuyoshi) (voice)

芹澤優
Tsubasa (Older Sister) (voice)

広瀬裕也
Hanzо̄ (voice)

伊瀬結陸
Inoue (voice)

引坂理絵
Space Octopus (voice) / Teacher (voice)

越後屋コースケ
Space Monster Mentaiko (voice) / Elder (voice)

ゆかな
Soothsayer (voice)

Rena Otsuki
Upskirt Girl (voice)

紺乃みん
Sexy Lady (voice)

石毛翔弥
Male Student 1 (voice)

古屋亜南
Male Student 2 (voice)

堂島颯人
Male Student 3 (voice)

斎藤こず恵
Cosmic Pig Host (voice)