Hitoyoshi, a high school kid who lives alone, hears a knock on his door. He opens it to find a strange girl offering to be his maid. She has beautiful…

The anime is set in the birthplace of the popular card game Rush Duel, Mutsuba-cho. Twins Yūhi and Yuamu run UTS (Uchūjin Trouble Sōdansho or Alien Trouble Consulting), a group…