Lushu Yi inherited a fortune and planned to throw herself into self-indulgence, but accidentally transmigrated into an ABO fake-sibling fanfic. She became a spare that shared name and surname with heroine O’s former bad boy partner. Shen Gui Tang, first heroine O, is the brilliant daughter of the fallen Shen family, top in grades and beauty, and a dream O for many Dong University students. At the school welcome event she, as an alumnus representative, spoke onstage and was singled out by the trash-like Alpha roadshow man Ru Shi Yi. Ru Shi Yi initially pursued her with warmth and care, but it was all a disguise. She had a pheromone deficiency disorder and injected synthetic pheromone for years, causing distorted and pathological behavior. After Shen Gui Tang was fully lured in, Ru Shi Yi manipulated, psychologically abused, insulted, then kicked her out; this period scarred her soul. Later Shen Gui Tang returned to family and was unexpectedly marked by the adopted daughter, the true heroine A. With night-and-day comfort she slowly recovered. \nRu Shi Yi faced family retaliation, company bankruptcy, liquidation, then suicide by sea with no trace. In an appendix, Shen Gui Tang met a lookalike spare of Ru and, during a psychotic episode, locked him in a basement and punished him brutally, leaving him permanently disabled. Ru Shi Yi had intended to escape but was forced into Alpha split on the day of transmigration and collapsed with fever. She woke restrained by Shen Gui Tang, who in her predatory stare said, “Lushu Yi, I can find you now. ” Ru Shi Yi trembled: “I am not really that trash ex, do you believe me? ”