
11-year-old Yusuke and his classmates camp in the woods and see a strange light. They discover a small metallic object like a robot which talks, calls himself Tetra and knows Yusuke's name. Tetra can create wonderful gadgets but actually has to save the world with Yusuke's help from extraterrestrials with bad intentions.
Soichiro Kanzaki

Noriko Kinoshita

Misaki Kinoshita

Yusuke Sakamoto

Hidetaka Ono
Toshiya Matsuoka
Yusuke's Father

Yusuke's Mother

Unknown Role

Misawa

Female Researcher / Voice of Tetra

Snack Shop Lady

Man
Agent B
Misaki Kinoshita, 20 years later

Byoid (voice)

Agent A
Yusuke Sakamoto, 20 years later

Toshiya Matsuoka, 20 years later

Hidetaka Ono, 20 years later


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