I Used a Delinquent Girl to Get Cashback, and My Ex-Girlfriend Is Freaking Out

His girlfriend of three years cheated on him with a rich second-generation heir for a Chanel handbag. After Lin Dong was dumped, he sneered and awakened the [Super Multiplier Tycoon System]! Whenever he spends money on a top-tier beauty rated S or higher, he gets a full refund, plus cashback multiplied by up to a hundred times and incredible rewards! Lin Dong thought his first target would be a cold campus beauty or a stunning CEO. But when the radar went off, the S-rank target in front of him turned out to be a “wild girl” with pink hair, tight bean-toe shoes, and bubble gum in her mouth! “What are you staring at? Never seen a beauty before?” “Sure haven’t seen anyone as wild as you. This Ferrari LaFerrari is yours. Stick with me from now on.” From that moment on, Lin Dong began his simple, utterly uneventful life as a tycoon.