In a world of dark, cold-hearted, sad people - will a cute, happy, pretty girl be able to save the world? After World War 3 came to an end, every regular citizen on Planet Earth was left in a constant sadness. People were being low-paid, and fights broke out everyday due to the outcome of the war. People are in constant sadness, things can no longer be done due to the outcome of the war. The people of Planet Earth are constantly looking for a solution - but nobody can help. The government lead extremely luxurious lives whilst many citizens die of hunger. Until one cute, happy girl comes from Mars - that girl is Michishige Sayumi. Will Sayumi's positive vibes help find the solution to a long-term problem? Read on to find out!