After being killed by the obsessive male lead Killian, Ines finds herself back in the real world as Sum. Determined to live differently this time, Sum resolves to finally claim a happy ending. But to her shock, she meets Haewon Lee, a school celebrity who looks exactly like Killian. As Sum grows confused by Haewon’s kindness-- so unlike the arrogant and violent Killian she once knew-- Haewon hides his true intentions, carefully shaping himself into someone Sum would love. What awaits them in the future?