Shen Zhinan and Jiang You are known in the neighborhood as "happy enemies". From grabbing dinosaur erasers in kindergarten to correcting each other's test paper answers in high school, this pair of childhood sweethearts has "love and kill each other" engraved into their DNA. Jiang You always said that Shen Zhinan was a follower who could not be shaken off, but she would silently hand him water when he was playing basketball, and stuff lozenges into his schoolbag when he had a cold - completely unaware that these small actions had already turned the young man's ears red.
Shen Zhinan, who has just begun to fall in love, hides his love in every prank. He deliberately tangled Jiang You's headphones, but secretly dimmed the desk lamp when she stayed up late to review; he complained about her clumsiness, and when it rained, the umbrella always tilted towards her. As for the very nervous Jiang You, it wasn't until she saw Shen Zhinan frowning for other girls that she felt sour in her heart that she realized that this sweetheart who always loved to annoy her had become an inseparable presence in her life.
When the boy's secret love that has been hidden for ten years is exposed, and when the slow girl finally understands the meaning of heartbeat, how will this "war" that lasts from kindergarten to adulthood lead to a sweet ending in a ridiculous way?
