Yandere Brother Stole My Boyfriend

Jiang Yicheng mistakenly takes Zhai Yue, the yandere younger brother of her boyfriend Song Xiuyan, for her own boyfriend. After having sex with him, she becomes obsessed with Zhai Yue. She originally dated Song Xiuyan for money and power, only to discover she was merely a substitute for his deceased first love. Zhai Yue is actually an old friend from Jiang Yicheng's childhood who has been devoted to her for years. With Zhai Yue's help, Jiang Yicheng breaks free from Song Xiuyan's control, returns to her violin career, and wins the music competition to publicly expose the substitute truth. Simultaneously, Zhai Yue exposes Song Xiuyan's financial crimes. In the end, Jiang Yicheng and Zhai Yue confirm their feelings and walk into a new life together.