Hayeon is a college student who struggles with social awkwardness, leading a rather uninteresting life, but with one unique trait: the ability to communicate with beings in outer space. A chance encounter introduces her to Ujun, an extraterrestrial interested in human behavior. When Ujun proposes taking control of Hayeon's body, she refuses and instead he takes over the body of her crush! As Hayeon helps Ujun adapt to life on Earth, their bond grows and romance blooms. However, their love is threatened by a scheming alien plotting to attack the planet. How will fate impact these two kindred spirits?