Jaehyun and Sungho have always been rivals, their families once close friends before either was born. Jaehyun is charming, smart, and impulsive, while Sungho is reserved, confident, and emotionally distant. Despite their differences, a strange bond connects them-whenever one feels pain or sorrow, the other experiences it too. A flower blooms on their hand as a symbol of this connection, only disappearing when the other kisses it.
Jaehyun despises Sungho's achievements, often frustrated by his mother's constant praises of Sungho's success. His annoyance only deepens the rift between them, as he is determined to make Sungho's life miserable. Sungho, tired of Jaehyun's antics, wants nothing more than to be left alone. But as the strange bond between them strengthens, their rivalry slowly turns into something far more complicated.
A tragic event shakes Jaehyun's family, causing him to confront the painful realities of his relationship with Sungho. As both struggle with loss and growing feelings for each other, the flower on their hands becomes a symbol of the emotional and physical turmoil they share. The connection they've always fought will either heal their wounds or drive them apart forever.
Will the bond they can't deny be enough to bring them together, or will it shatter everything they know?