Haneul seems ordinary enough. A boxer. A quiet man with a strange sense of humor, an empty refrigerator, and a habit of somehow ending up wherever Detective Yeong-mi is. But Haneul has another name. Sky. Behind the mask, he is one of Seoul's most feared men-a cold, calculated killer connected to an organization powerful enough to make evidence disappear, silence witnesses, and turn the city upside down. And Detective Yeong-mi has spent years hunting him. Neither of them realizes what they've walked into when a simple late-night bus ride brings them together. To Yeong-mi, Haneul is just an annoyingly kind boxer who let her sleep on his shoulder. To Haneul, Yeong-mi is just an exhausted detective he unexpectedly enjoys being around. Until her file lands on his phone. His next target: Detective Yeong-mi. Killing people has never been difficult for Sky. But when Yeong-mi appears in his sights and his finger rests on the trigger... he can't pull it. He doesn't understand why. And that single hesitation begins to destroy everything. Soon, the detective hunting Sky becomes the woman Sky is willing to protect, even if it means turning against his own people, putting a target on his back, and burning down the world he built. She wants to uncover the man behind the mask. He wants to keep her alive. But when Yeong-mi finally discovers that Haneul and Sky are the same man... will she see the monster she spent years hunting- or the man who chose her over everything? A story of crime, action, secrets, loyalty, impossible choices, and two people who were supposed to be enemies.

"He looked like the kind of boy who'd apologize for bumping into you..." He wasn't. Yang Jungwon was every mother's favorite, every professor's pride, and the quiet boy everyone thought they had figured out. Then he moved in next door. Behind that gentle smile was someone who knew exactly how to get under my skin, steal my peace, and make every promise I made to myself impossible to keep. We were supposed to be just neighbors. Then classmates. Then best friends. Falling in love was never part of the plan. Some fences are built to keep people apart. Ours only gave us another reason to find each other. A slow-burn, neighbors-to-lovers college romance.