When Leo, the quiet dreamer with walls around his heart, crosses paths with Sangwon, the boy who shines like morning sunlight, a story of unexpected warmth begins to unfold. What starts as simple banter soon deepens into late-night talks, unspoken feelings, and a bond that feels both terrifying and inevitable. Together, they learn that love isn't always loud, it's in the small glances, the comfort of silence, and the promise of "I'm here" when the world feels too heavy. Leowon isn't just a love story, it's a journey of healing, trust, and finding a home in someone's soul.

Childhood promises linger long after years of distance. Lee Sangwon and Lee Leo were inseparable as kids, bound by laughter, secrets, and a vow to always stay by each other's side. But when Leo leaves for the city, Sangwon is left behind, carrying a quiet love that grows in the shadows of his heart. Years later, Leo returns to their coastal hometown, and the reunion sparks a whirlwind of longing, jealousy, and unspoken truths. Sangwon struggles to navigate his feelings, while Leo grapples with the realization that he has always loved Sangwon too. Amid the gentle chaos of friendships, budding romances, and childhood memories, hearts are tested and confessions are made. As waves crash against the shore, old bonds are mended, new love begins, and two souls finally choose each other-breaking the silence that has held them apart for so long.

Lee Leo and Sangwon met as classmates in college, both pursuing Psychology. On the surface, they couldn't be more different-Leo, quiet and withdrawn, keeping the world at arm's length, while Sangwon was curious, openhearted, and drawn to people. When Sangwon noticed Leo always sitting alone, he reached out, determined to befriend him. At first, Leo was difficult to understand-complicated, guarded, a puzzle Sangwon couldn't quite solve. Yet over time, a bond grew between them. Laughter, long conversations, fleeting glances-moments that seemed to hum with something more. For Sangwon, that something blossomed into love. He tried to hide it, fearing it would ruin what they had. But the way Leo looked at him-the spark in his eyes, the warmth in his smile-made it impossible to ignore. For a year, Sangwon treasured every detail, every glance, every heartbeat that made him believe the feeling might be mutual. Finally, he gathered the courage to confess. Leo's response was gentle but devastating. Though touched that he had been someone's happiness, Leo admitted he could not return Sangwon's love-he was straight, and his heart did not sway in that direction. He promised nothing would change between them. But everything did. Days later, Leo began to drift away-ignoring Sangwon, avoiding meals, acting as if their closeness had never existed. Sangwon's heartbreak curdled into anger, betrayal, and bitterness. The friendship that once lit up his life collapsed into silence, leaving only resentment where love had once been. Two years passed. Wounds remained unhealed. Then fate intervened. Their professor assigned them to a joint project-one that required living together for a month, observing each other's habits and daily lives. Forced into close quarters, Sangwon and Leo must confront the wreckage of their friendship, the love that was never returned, and the unspoken truths still lingering between them.

Enemies. Partners. Something more. Leo is the golden boy of the university - effortlessly popular, charming, and hiding the kind of family secrets that don't make it into Instagram posts. Sangwon prefers silence to small talk, deadlines to drama, and solitude to social events. They never planned to speak. They definitely didn't plan to be paired for a semester-long group project. But when late-night studio sessions turn into soft glances, and shared playlists say what words can't, the line between rivalry and something more starts to blur. Sangwon hums when he's focused. Leo listens like it matters. And neither of them is ready for what happens when walls start to fall - one song at a time.

Leo promised never to betray the one he loves. At first, he thought that meant Haerin, the girl who brightened his days. But when her lively brother Sangwon enters his world, Leo begins to question where his heart truly belongs.

Sangwon, a dramatic soul with serious looks and too many thoughts, accidentally texts a complete stranger at 1 AM to rant about his annoying neighbor. But instead of ghosting, the stranger replies with curiosity. Leo, the soft-voiced text therapist who turns out to be... maybe a little too perfect. Between rants, sky photos, and suspiciously poetic late-night chats, two strangers start peeling away their walls, one message at a time.

Jealousy friend (Leowon will debut soon )