At Xi Luhan's High school, It's all the rage to wear paired rings with girl you love. Luhan wears one though he is single, and one day inadvertently discovers that his ring pairs up with that tall, handsome and smart Oh Sehun, the senior classman idolized by the entire school. Though Sehun has a reputation for being kind to all, when dealing with Luhan, he is strangely harsh.Their paired rings somehow draw them together and the two alternately clash and attract, as they must sort out their budding feelings.