Luo En was originally an ordinary college student at a university in City C. He lived a contented, stable and fulfilling life. He studied and had fun with his classmate Su Muyang and a group of roommates, and lived a fulfilling and happy life every day. However, Luo En was always worried about being single, and in his heart he was thinking about Shen Guang, his baby sweetheart who had been separated for many years. Years ago, on the birthday of classmate Gu Jiang, everyone accidentally lost the doll's personal token at a KTV party. They were very sad, but they were unexpectedly picked up by Shen Guangnian, who had just returned to China. Their love started to blossom. The two met early, but accidentally missed them several times. They went around and around, looking for the ingenious arrangement of fate. In the middle of the platoon, they unexpectedly reunited in a red maple forest. The ties between the baby and the memories of childhood sweethearts came thickly. Years of longing for each other made the two fall in love quickly after the reunion, and the sweet love began. Later, because of Lorne's accidental injury, Shen Guangnian decisively proposed. Just like that, Before she even got her diploma, Lorne got married to the baby whom the elders loved to see at first, and married for love. Although Su Muyang was frustrated and bravely confessed her love during the process, the devoted Lorne still stuck to her inner feelings and remained in love with Shen Guangnian, knowing each other as before.