When their influential families arrange their marriage to secure a business alliance, Lee Minho and Kim Seungmin couldn't be more reluctant, or more different. Minho is meticulous, introverted, and lives by carefully constructed routines. Seungmin, on the other hand, is lively, spontaneous, and a perfectionist in his own unconventional way. Agreeing to coexist under the same roof while leading separate lives, they hardly cross paths, until a high-stakes joint project forces them to work side by side. What starts as reluctant cooperation quickly becomes a battle of clashing personalities; Minho's need for structure against Seungmin's impulsive creativity. Yet as long nights turn into quiet conversations and small moments of vulnerability, the two strangers begin to see each other in new light. Minho admires Seungmin's warmth and resilience, while Seungmin finds comfort in Minho's steady, unshakable presence. Their initial indifference transforms into a cautious friendship, marked by teasing banter and mutual respect. Neither dares to name the feelings growing between them, but the bond deepens with each shared moment. As the project nears its conclusion and life threatens to pull them back into old routines, both realize that what began as an obligation has quietly become the most meaningful connection they've known. In a tender, unguarded moment, Minho and Seungmin finally acknowledge their feelings, choosing to embrace the life they've built, not out of duty, but out of genuine affection and hard-earned love.

Lee Minho and Kim Seungmin have a strange dynamic that no one outside their friend group really understands. They aren't rivals for the spotlight, and there's no deep professional competition driving their tension. They just love to bicker. What seems like endless teasing and sarcastic comments is actually their version of bonding, though most people can't tell where the jokes end and the affection begins. Their friends have learned to roll their eyes at the constant back-and-forth. It's no secret to them that Minho and Seungmin's rivalry is more flirtation than actual dislike. The playful arguments always seem to linger a bit too long, and the tension between them has an undeniable spark. But beneath the teasing, there's something neither of them is willing to acknowledge. Minho enjoys how Seungmin challenges him in a way no one else does, while Seungmin finds comfort in how Minho always knows how to get under his skin. Their friends see through the facade, waiting for the moment when one of them will finally admit that all this playful discord is just a cover for their growing feelings. As they both navigate their high-profile lives, Minho and Seungmin start to realize that their bickering is no longer just for fun. It's become the way they communicate something deeper, and now they have to figure out if they're ready to drop the pretense and face the truth about what's been there all along.