Fantasy: Pick up a Sister at the Beginning

What should I do if I am reborn as the most outstanding genius and take a mortal sister? Qin Yu kills enemies for his sister, catches a real dragon to travel around, and takes fairy medicine to live forever. "Brother, lend your sister the catalog of gods and demons to play with!" "Brother, my sister is so bored, I want a hug!" "Brother, when will I get a saint sister-in-law for my sister?" "Brother, our territory is not big enough. My sister is worried!" "..." Qin Yu stood at the end of the road and smiled softly: "Don't worry, sister, this is nothing!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.