This is a modern version of a man who rides a bamboo horse and goes around the bed to make love with his childhood sweethearts. The biggest enemy of Tian Miaomiao, who has been lively since childhood, is Ye Jing from the house next door. Their noisy youth constituted their inseparable childhood and adolescence. The two people, who originally thought they were just brother and sister, meet again in college after being separated for many years. What awaits them, will they renew their relationship or become strangers?