Synopsis：To pay for her father's medical treatment, Rosie marries Mason under a three‑year contract, taking the place of her runaway twin sister. Three years of quiet devotion finally melt his cold heart—until his first love suddenly returns and destroys her fragile happiness. Exhausted by neglect and heartbreak, Rosie walks away the moment the contract ends, never looking back. When Mason learns the truth and is filled with regret, she is already long gone.