Gu Chanyang is a stubborn, old-school college senior desperate to survive group projects and graduate. Shin Hagyeol is the dazzlingly handsome junior in his group who claims he can't study because a magpie spirit has hijacked his body. To break the curse, Hagyeol needs a dragon's tooth and he needs Chanyang's help to get it. Chanyang knows he's walking straight into a trap set by a highly suspicious, overly affectionate giant puppy of a junior, but with his graduation on the line, he has no choice but to play along. Let the supernatural campus chaos begin!