I Tried to Take a Small Advantage, but Ended Up Marrying a Nine-Tailed Celestial Fox

[New book: The Invincible Female Ghost Has a Bit of a Romantic Streak is now available] Lu Yuan transmigrates to an ancient world where living conditions resemble those of the 1970s and 1980s. After transmigrating to a place where only wealthy families can afford a meal of white-flour buns, Lu Yuan can only stare in disbelief. Fortunately, as a transmigrator, Lu Yuan has gained a Bargain System. He spends fifty-two cents on a meal, and when the shopkeeper rounds down the bill, it triggers a tenfold drop rate and rewards him with twenty cents! It doesn't seem all that useful, but in this world, if he keeps a careful eye on his money, he can still make a good life for himself. Just when Lu Yuan thinks this is how he'll spend the rest of his life, he spots someone approaching in the distance, with six dazzling words shining above their head. [Supreme-Tier Bargain] Gasp~~