Lian Ai is a psychology doctor with zero love experience. In order to write a thesis "The Effect of Love on the Brain", he recruits "intern boyfriends". Qu Zhuanjiao is a bar owner. When he signed up, he said: "I have rich experience in love, so I can teach you." The two started the "experiment" by holding hands, recording heartbeat and dopamine data while practicing love. On the 99th day, Qu Zhijiao put the ring on her hand: "The experiment is over, the conclusion is - please give me advice for the rest of your life when you are in love.
