Aoi Jinko (Takeuchi Yuko) is a biologist. While studying in London, she met Nanyuan Xiaoshi (Uchino Seiyo), who is also a biologist. The two people with similar interests gradually came together. However, what disappointed Renzi very much was that Xiaoshi was a playboy who liked to mess around with flowers and grass. Xiaoshi did not feel the slightest guilt for this, but attributed the reason to the instinct of the creature. The angry Renzi chose to break up. After returning to China, Renzi entered the research institute and met the elementary school teacher Shiraishi Jianyi (Huangchuan Tian Masaya). In the process of getting along, the two hearts slowly approached. At this juncture, Xiaoshi also returned to China and became Renzi's colleague, which made Renzi feel very unhappy. At the same time, Renzi and Jianyi's relationship was not smooth sailing. Renzi's love for insects made Jianyi feel the frustration of being ignored.