My brother became a love brain

I used to be close to my brother, but he suddenly changed and became a love brain.He was treacherous, he was indifferent, he forgot all the vows between us, he wanted me to bow my head, and pave the way for his lover to bow his head.I had endured enough and took some measures to finally make him (bei) normal (wan) normal (huai).Note: I am Gong, and Gong is not a good person. All plots are fictitious, please do not imitate, the three views are not correct, and the stalk is very strange.Unit text, fast time travel without memory, consistent name, non-slicing.The first world: I studied hard and worked hard and got the first grade in the exam. My brother's lover never studied and got the second grade because of cheating. My brother asked me to give up the recommended place and give it to his lover.The second world: I helped my brother ascend to the throne, but my brother turned his back on it and refused to marry my sister. Instead, he conjured up a low-status person and asked me to give him his status and help him marry my brother.The third world: My brother fell in love with a starlet, and all kinds of unimaginable changes happened to him, and finally... The fourth world: I treat my brother as a brother, but my brother wants to sleep with me? (The setting is strange)... First abuse and then enjoyment.