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College student Jisu decides to spice up a quiet night alone with a bold new idea, only for everything to go wrong at the worst possible moment. Before she can even begin to enjoy herself, the key to her shiny new handcuffs slips away and disappears beneath the closet. Trapped, flustered, and out of options, Jisu realizes there is only one person who can help her: the handsome man living next door. Swallowing her embarrassment, she heads over in desperation, setting the stage for an unexpectedly intimate encounter that neither of them saw coming. (Source: Lezhin US)