Dai Dai, a lively, cheerful, kind and generous primary school teacher. Yang Yi, a taciturn, handsome and indifferent college student. When Yang was nineteen years old, he met Dai Dai, and from then on there was sunshine in his life! His world is no longer dark because of her existence! Yang Yi loves Dai Dai, she is his only attachment and only love. Dai Dai also loves Yang Yi. He is the child she raised personally and he is her relative. The difference in age and status in his heart meant that Yang Yi was destined to experience a bitter love affair. An ordinary yet a bit extraordinary love story, two ordinary yet a bit extraordinary people. How can two equally stubborn people solve this mystery called love?