Su Wan never thought that she would have a flash marriage with her high school classmate Lu Shiyan - or a "marriage by agreement" urged by their parents. I thought that after marriage, we should treat each other with as much respect as "ice", but this former deskmate was always abnormal: he would remember that she didn't eat coriander, would make hot soup when she worked overtime, and would seriously say "she is my wife" when her friends teased her. When the "non-interference" in the agreement gradually turned into "subconscious concern", when the unspoken heartbeat in high school surged again, Su Wan looked into Lu Shiyan's eyes and suddenly wanted to ask: "Mr. Lu, can our 'agreement' be changed?"