It's your 21st birthday, and Felix and Hyunjin are helping celebrate an after party when everyone else leaves.
Being an outcast was difficult, but when the two hottest guys in college suddenly take an interest in you, you're intrigued to find out why. Everyone knows they're adrenaline junkies and they're always doing something dumb. But when you discover their secret and get entangled in a strange world of escalating situation...