Twins Yuhi and Yuamu Ohdo believe there's alien life beyond the stars, even though their attempts to prove it have only ended in failure; their hard work and dedication are about to pay off when an extraterrestrial finally arrives on Earth!
Yuhi Ohdo and Yuamu Ohdo are elementary schooler twins living in Mutsuba Town who are in charge of the alien extermination company UTS (Ultraterrestrial Trouble Solutions). They spend their days working really hard searching for aliens using a mysterious device created by Yuhi... that is, until one fateful day!!