share time: 2026-01-14 00:31:31
Su Wan, a struggling young professional, binds to a "Counterattack System" to pay off debts and is forced to act as the substitute for Gu Jingshen's white moonlight—a wealthy young master. Meanwhile, Gu Jingshen, who saw through the substitute game, plays along deliberately: he needs an "ex-girlfriend substitute" to avoid his grandma's marriage pressure, and Su Wan walks right into his plan. They sign a fake couple agreement with hidden agendas, but their act grows real—Su Wan's clumsiness when blocking alcohol for Gu, his tenderness when secretly repaying her student loans, all dismantle their "substitute masks". Until the system prompts, "The target has fallen in love with you," Su Wan realizes: she's never been a substitute—she's Gu Jingshen's long-hidden "only one."
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