Wang Shengji (played by Oh Ji-ho) is a handsome obstetrician and gynecologist. He is very skilled in his work and is familiar with the female body structure. He also has his own unique insights on sex. However, Wang Shengji, who knows the female body well, knows nothing about what is going on in a woman's head, and knows nothing about love. Ji Shenxue (played by Jiang Yiyuan) is a female urologist. Her special profession has made her "read countless birds" and she is familiar with topics such as size and hardness. However, under the appearance of being carefree and unrestrained, Ji Shenxue is a "pure girl" who has never even had a love affair. Fate brought Wang Shengji and Ji Shenxue together. At first, they both regarded each other as a thorn in their eyes. However, as time went on, they gradually discovered their common points and loveliness, and they got closer and closer to each other.