Open Up!

Returning to college after a hiatus, Mun Yeon-Su suffers a lapse in judgment one evening after drinking heavily. In his haze, he accidentally wanders into the wrong apartment—a unit that coincidentally shares the exact same door code as his own. Inside, he is met with an unexpected and intensely intimate encounter between Yun Do-Ah, a teaching assistant from his department, and Hong Yi-Jae, a fellow classmate. Although Yeon-Su attempts to move past the mortifying mistake the following morning, the vivid memory of the private encounter lingers. He finds himself unable to shake the impression left by what he witnessed. When subsequent campus encounters bring him face-to-face with the duo once again, his ordinary academic routine dissolves, plunging him into a chaotic and complicated new chapter of university life.