Su Yin is reborn in her first year of high school.
Her first priority is to find the “Big Brother Star” who was the only person to bring her warmth when she was young, and stop him from destroying himself.
When she finds him, she discovers that he is suffering from severe depression.
With a clever little trick, Su Yin “tricks” him into signing an “Exclusive Sidekick Contract.”
On the surface, she bosses him around, but in reality, she's giving him a sense of purpose by making him feel needed.
By chance, Su Yin discovers that her piano playing can, through some mysterious resonance, help Lu Ci feel emotions again. She becomes his only emotional “duet partner.”
With Su Yin by his side, Lu Ci begins to face his emotional disorder.
But just as he tries to break free from his dependence on Su Yin, he unexpectedly discovers that he can no longer feel the emotion of “liking” her. Does this mean his feelings for her are real, or just another illusion brought on by his mind?
