Debt of Gratitude

One day, Yan Miao had a sudden idea and asked Mubai who was reading the newspaper, "Hey, let me ask you something. Why did you fall in love with me in the first place?" Mubai's hand while flipping the newspaper paused for a moment, but in the end, without even raising his head, he slowly uttered three words: "D cup." In a word; if you sleep with the wrong person, you will definitely have to repay your debt of gratitude. Conception: