Synopsis

"From the creator of ""Boy Meets Girl!"" Cha Seonho lives a humble yet diligent life, but something has been bothering him for months: someone keeps leaving a sticky mess in his locker. As the cruel pranks escalate, Seonho and his best friend, Lee Yugeon, decide to catch the culprit by staking out the locker overnight. But when Seonho takes a break to visit the restroom, he discovers something deeply unsettling has happened to his own body…"