I Rely on Gifting the Female Supporting Character to Get Cash Back

Qin Ran has been in this world for almost twenty years, living a life of luxury by spending money on the beautiful older sister she fell in love with at first sight. But one day, she discovers that the beautiful older sister is going to participate in a talent show. At first, she thinks she can finally live a life of luxury by spending money on her sister, but then she realizes that the world she's transmigrated into is actually a novel! And her beautiful older sister is...