The year is... sometime not so far into the future. After exhausting Earth's natural resources, humanity is on the verge of extinction. Komaru, a new recruit in the Museum of World's Civilisation, is on his way to becoming humanity's saviour. A newly invented time machine allows him to travel back in time to Edo Period Japan. Seizing this opportunity, Komaru has to collect all sorts of valuable items and learn the wisdom of the ancients in order to restore balance on Earth and give humanity a chance to survive.