When she was seventeen years old, Yu Nianchu, a top student in G City No. 1 Middle School, met Lan Jiayi, a bad boy in the eyes of the teacher, who smoked, drank, skipped classes and went to bars, but it happened that such a playboy who was eating, drinking and having fun slowly came into her heart. That spring, love blossoms bloomed all over the campus, but she no longer had the intention to appreciate them. From then on, there was only him in her world. He was her first love, and she was his entire youth.