A.D. 20XX year, the Taiyo- city along the seashore in the Kanto district.
There, it was the lake of Ryusei-ko which are said for the meteorite to
have fallen of ten thousands years ago.
The thing of the mystery which was sleeping in the meteorite on the bottom
of a lake in inside tended to hatch one after another.
Such a certain night, the classmate of a junior high school, Kentaro Shiratori
and Takeshi Kido, An accident occurs in the personal computer of them.
The image which declares itself KOPU appeared and it told two persons "Save
this world from the hand of GOMON."