The stories between us are like an endless spiral, entwined with each other, but always maintaining a certain distance in the middle.
Li Xiawei, a coward who struggled to show her good intentions and didn't dare to express her feelings, yet showed her love to everyone.
Fang Kexin, a tsundere who gradually fell in love with her and gradually induced her to reveal her hidden secrets. However, she also fell into the insecurity caused by this love and was unable to extricate herself.
In relationships, no one can protect themselves wisely, just like Galileo's pendulum experiment. The pendulum of this relationship swings back and forth between friends and lovers; the boundaries between us are becoming more and more blurred, and our relationship is becoming more and more elusive. I can't understand, what is the relationship between us?
Can a coward who struggles to express his love reveal his true feelings? Can the arrogant ghost caught in her emotions induce her to reveal her secret? When will the "spiral" between us end? Forward, or retreat? How will we choose?