After the Daughter of the Richest Man Wore the Wrong Clothes, the God of War Relied on Me

When I woke up, I became an ancient hawker, and the system asked me to sell air. >I was complaining about this outrageous mission, but the cold-faced prince suddenly appeared: "This thing... Could it be immortal energy?" >After selling it at a high price, he came to check in every day, and it also had an advertising effect. >Until one day the system suddenly prompted: "Congratulations on achieving the hidden achievement of 'Princess'——" >The prince's ears were red and he took out a marriage certificate: "Either get married or lose money. The 'immortal energy' you sold... I've been spoiled by it."