A boy (Ostrich Boy) loses an arm in childhood and a cheerful girl (Crab Girl) grow up as neighbors over two decades. Their intertwined lives, marked by mutual rescue and growth through life's trials, culminate in a comic My Crab Girl reuniting them and unveiling a decade of hidden affection.

Yu Mingxi, an ordinary girl with a gift for sports, enters the elite Jingcai Academy to honor her late father’s dream. There, she meets Jiang Bohan, a brilliant student hiding behind a rebellious front. As their lives intertwine, they peel back each other’s masks, confront past wounds, and begin to heal through an unexpected connection.