Dressed as the Brave Man's Sister, I Became the Devil

Because the other world was contaminated by the power of evil gods from outside the territory, the gods of the other world sought cooperation from Blue Star. Choose a time traveler from Blue Star to be reincarnated into a different world to help purify pollution. Young Aegonas was born into a small village family in the Radas Empire, which is full of swords and magic. When he was forced to offer it as a sacrifice to the demon king who had just arrived at the altar, She recalled the Blue Star memory, There is also the power received as a gift from Blue Star, and a book-shaped system that claims to be God. The system shouted, [According to the transaction with Blue Star, you must assist me in cleaning up the pollution left by the evil gods in this world, including demonic energy, monsters, demon kings and other related demons. The sky is filled with endless weapons glowing with metallic cold light, and the smoke emitting from them indicates the fierce battle that has just occurred here. Aegonas, who traveled through time after finishing the college entrance examination and just killed the Demon King, became the new Demon King: "…………??" Is it still too late for Zisha to go back and apply for the college entrance examination? Many years later, when the real demon heroine, who has grown into a fair-skinned, lovable and fragile beauty, discovers that her newly reunited brother is a brave man, Decisively, it seems that it would be good to pretend to be a good-for-nothing beauty. But Agnes forgot that the companions of a brave man are still brave men. When they came back to their senses, they were surrounded by brave men. They even put aside their arrogant status and acted with red faces and caution like ignorant young people. Don't come over here! ! ! Agnes hugged her new friend and best friend tightly. Sure enough, it was better to be a young lady. The girl buried in the arms of her 'best friend' couldn't see her 'best friend' looking satisfied and slightly crazy, embracing the treasure in her arms gently and forcefully. Ps: The male protagonist finally thought about it and settled on it being the sexual transformation of a certain female partner. Intention: Cherish the people around you who love you