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.

Top Cast

Shingo KatoriSoichiro Kanzaki

Miki SakaiNoriko Kinoshita

Anne SuzukiMisaki Kinoshita

Yuya EndoYusuke Sakamoto

Kyôtaro ShimizuHidetaka Ono

YukiToshiya Matsuoka

Katsumi TakahashiYusuke's Father

Kuniko AsagiYusuke's Mother