You Cheng and Wen Ting, a young couple in high school, awkwardly attempt to hook up. However, the encounter leaves You Cheng hyperventilating and filled with embarrassment and disappointment. Determined to understand the cause of his reaction and faced with his sulking girlfriend, You Cheng decides to observe other girls' bodies in an attempt to unravel his problem. Unexpectedly, he stumbles upon a naked Jing Hao, and a surprising reaction unfolds.