Fang Yu met Tan Yunshu at the age of 19—they were the same age and attended the same university. She was the daughter of the Tan family’s newly hired maid, while Tan Yunshu was the elegant and noble heiress. Her mother sternly reminded her to stay in her place, focus on her studies, and never provoke Tan Yunshu, whether inside or outside school. They were from different worlds: one dazzling and bright, the other lowly as dust. Fang Yu truly abided by this—until Tan Yunshu was the one who provoked her. The dignified Tan family heiress repeatedly knocked on her door at night, filling the cramped, barely-two-person room with an air of ambiguity. Over those three years, Tan Yunshu would grow jealous when others confessed to Fang Yu, whispering time and again in her ear, "You’re mine." Only after graduation did Fang Yu learn the meaning behind those words—she had merely been Tan Yunshu’s pastime— Because Tan Yunshu was about to get engaged. She even personally handed Fang Yu the wedding invitation with a smile, under the pretense of being university alumni. That same night, Fang Yu cut off all ties with Tan Yunshu. --- Tan Yunshu had always treated Fang Yu as her possession—a pressure-relieving distraction. Until the day Fang Yu vanished from her world, completely and irrevocably.