Wataru Hoshibe, an elementary school student in fourth grade, is a RyuTuber who wants to become a superstar. His adventure begins in the Chubukai parallel world alongside Ryujinmaru, a Mashin that Wataru created out of blocks to defeat the final boss, Enjoda!

Mutsumi Tamuraas Wataru Hoshibe (voice)
Tomokazu Sugitaas Ryujinmaru (voice)
Atsumi Tanezakias Kakeru Amabe / Uzume (voice)
Katsuyuki Konishias Offline / Online (voice)
Megu Umezawaas Maro (voice)
Rie Kugimiyaas Ryun Ryun (voice)
Aoi Ichikawaas Sho (voice)
Shunichi Tokias Mygah (voice)
Shigeru Chibaas Grandpa Channel (voice)
Jun Fukuyamaas Master of the End (voice)
Yoichi Kato
Keiichi Hirokawa