Hu Eunsu is in her final year of high school and couldn't be more relieved. That is until a foreign exchange student by the name of Kunpimook shows up and makes her question not only herself, but everyone around her.

Mark needs girl advice and Jackson reveals the JackBam life.  

Kunpimook goes to a school event, where he meets Yugyeom. They hang out all day, but when Kunpimook goes home that night, he has nightmares about monsters and ghosts. This continues for a long time and he's desperate to find out what happened to him. What really happened at the event?