This is a college youth novel set in a special group, 2B college. This is a class with a male-to-female ratio of only 6:1 and a serious imbalance of yin and yang. There are overt and covert struggles among girls and brotherhood among boys. The irreparable damage and incurable shadow caused by the recklessness of youth, the polyamorous relationships between bisexuals, and the complex polyamorous relationships between friends allow us to relive every bit of college life step by step as the heroine grows up. The bright smile, the pure friendship, the unique romantic ignorance in the green days, the deep hurt and the fierce revenge. Finally, at the time of graduation, all of them were forgotten with a glass of wine and a smile.