My Sex Tutor is a Ghost

At twenty-six years old, Hyeon-Ho Lee has never experienced romance. Instead of pursuing relationships, he has dedicated his life entirely to physical fitness, believing that completing his demanding military service in the Marines would finally give him the confidence to conquer any challenge. Despite his imposing physique and unwavering discipline, his personal life remains completely stagnant, leaving him isolated and inexperienced. Everything shifts when a friend helps him secure employment at a hotel, pulling him out of his solitary routine and into an unfamiliar environment. It is here that his ordinary existence takes an extraordinary turn. During his shift, Hyeon-Ho encounters a mysterious young woman staying in one of the hotel's luxury suites. She offers him an unexpected proposition: she will teach him everything he needs to know about intimacy. This bizarre encounter with the enigmatic guest becomes the catalyst for a profound transformation. Guided by her unconventional lessons within the lavish confines of the suite, the lifelong virgin begins a journey that promises to reshape him completely. What starts as a simple offer of assistance evolves into an experience designed to turn a disciplined but romantically clueless former Marine into a master of seduction.