When a world of 2-D beings discovers the existence of our universe, they send a team of beautiful Domni-Matrixes into our world to prepare it for total integration. However, once liberated from their flat and dreary 2-D existence, Compiler and Assembler quickly discovered that cybersex with a couple of 3-D guys is a lot more fun than world conquest. Now, in between interfacing with their boyfriends, Assembler and Compiler must protect the Earth from being deleted by their former masters and an army of killer programs. 
(Source: Anime News Network)

Compiler and Assembler have been given 3 days to return the the 2-D world. If they do not return the council has sworn to destroy it. How will the they spend their last days on earth. Will they be able to confess their love. If only things were that simple. Now a mysterious character is eliminating other individuals from the 2-D world. Can Compiler and Assembler stop this new fiend and be together with those they love. 
(Source: Anime News Network)

COMPILER is a story about the Igarashi brothers Nachi and Toshi, and two beauties from another dimension, Compiler and Assembler. Originally sent to conquer Earth through a game of destruction and creation, Compiler and Assembler ended up deciding that living in our world is more fun than conquering it. They moved in with Nachi and Toshi. A growing relationship began to develop between Nachi and Compiler, and Toshi and Assembler, though none of them can bring themselves to admit it outright. 
Meanwhile, the people who sent Compiler and Assembler to conquer Earth were outraged by their apparent betrayal. They sent two assassins, Bios and Directory, to deal with the renegades and proceed with the invasion plan. And so, the misadventures begin...