The story is set in a world where a tokusatsu hero TV series "Outer Man" has gained national popularity for 50 years (just like the Ultraman series). One day, a giant alien looking exactly like Outer Man appears in Japan. The truth is soon revealed that, unlike the story in the TV series, Outer Man is an evil alien who has been trying to brainwash Japanese people to invade the earth. The actors who played the hero in the TV series decide to fight against the real Outer Man by transforming into the villain alien in the series, Sylvie Seijin.
Dan (Mitsu Dan) is a former geisha, now working as an ace pilot for the Earth Defense Troops. Her fiance was killed by the space monster Bemurasu which consumes nuclear waste. To save Planet Earth, Dan attacks Bemurasu, but whenever she does, she feels ecstasy. Can she save Planet Earth?
Secretary Yabunaka
At the end of the 20th century, the Earth Defense Force continued to protect the earth from aliens and monsters that invaded one after another. Returning to the origin of his successful work "Earth Defense Girl Iko-chan". With AKB48's Haruka Katayama and SDN48's Kayo Noro as cast members, nine unique beautiful girl members fight against the invaders to defend the earth.
