The Story of the Growth of the Evil Fairy

The top student in my previous life was reborn as a girl from a poor family, taking the scientific examination for my brother to see how I can make a difference in the academy... What? Am I still the prince's young master, the dragon star-lord, and the god's chief emissary? Ahem, everyone should stay flat... As for that person, I just accidentally saved you, so there is no need to pledge my life to you...