Bing Ning, who looks lively but is cold on the inside, asks Ning to send love letters because her best friend likes Ji Chengyang. From the first time they met
, Ji Chengyang liked Ning, so she chased her desperately. Finally, the indifference in Bing Ning's heart melted away, but she remembered that her friend also liked her. Should Bing Ning be sad for her friend instead of her own happiness? Where should Bing Ning go between friends and lovers?