Protons from the seven countries, a ten-year agreement.
She is the pearl of the Yun Kingdom held in the palms of her father and brother, but she is forced to step into Tianshu City and become the most sensitive person in the power chess game.
In her youthful days when she was riding a horse and shooting poetry, she and Yan Guo's stern proton went from tit-for-tat to secret love, but she didn't know that sweet moments are the prelude to a storm.
When national borders tear apart alliances, classmates turn against each other, and the whispers in the library of the past turn into swords on the battlefield.
If he wants to protect her, he can only use alienation as a shield; if she wants to break this deadlock, she can finally use wisdom as a blade.
This is a heartbeat that started when young, but it is destined to measure every inch of sincerity with family and country as the scale - the sweetest sugar is wrapped with the sharpest glass shards. In the torrent of disputes among the seven kingdoms, can they hold on to that ray of youthful light?