In A.D. 1997. Having failed to conqer the Earth, Compiler and Assembler from Another World settle down in the residence of Nati and Toshi Igarashi whom they choose as their partners. As they start their literally unworldly community life, various Sudaran assassins arrive from Another World one after another to attack Compiler and Assembler, until, in good time, all of those begin to turn into old memories... Yes, in 2000, the last year of the century, Assembler has started to lead quite a different life --- a life as a "human being"......