The Daku series takes place in the distant future of the 31st century. The entire world has abandoned the mainland and have moved onto the ocean, cities built on gigantic ocean platforms. Humans work by day, while during night the latest invention takes over: robots. Many different types of intelligent robots that complete different kinds of work.
Daku is one of the robots. The stories focus around him, the struggles of being a robot and the responsibilities that comes as a special built machine.