Saiga is a normal high school student with a gift in mathematics. His daily routine is disrupted when his family gets news that his Father's remains have been discovered—a noted archeologist and researcher who had gone missing while exploring a site many years before. Among his remains were notes and artifacts that needed to be identified by the family near a notable triangular mountain in Japan known as "Japan's pyramid", a place suspected by some to be man-made. A meteor containing a strange robotic lifeform falls from the sky and begins to cause destruction, putting Saiga in danger and causing a mysterious bracelet from his father's research to activate and merge him with an ancient robot burried within the pyramid—a robot the runes describe as Reideen. It is now up to Saiga and guardian Reideen to fight against this unknown alien threat from the sky.
(Source: ANN)+ More
Characters & Voice Actors
Hoshikawa, Hana
Supporting
Kobayakawa, Shiori
Supporting
Roxell
Supporting
Terasaki, Soji
Supporting
Recommended for you
My Senior Brother Is Too Steady
ONA
20m
Hirogaru Sky! Precure
TV
24m
Dragon Raja
ONA
49m
Delicious Party♡Pretty Cure Movie
Movie
64m
Martial God Stream
ONA
7m
Legend of Immortals 5th Season
ONA
25m
Edens Zero 2nd Season
TV
23m
Hell's Paradise
TV
22m
Buddy Daddies Recap
Special
24m
Mashle: Magic and Muscles
TV
23m
My Home Hero
TV
23m
Heavenly Delusion
TV
22m
Dead Mount Death Play
TV
23m
