Marriage allance I agreed You don't cry

On her birthday, the super-strong female lead is cruelly given away by her selfish fiancé as a bargaining chip. The straightforward CEO male lead, who has waited for her for fifteen years, takes the chance to stand by her side instantly. He pours out sweet words endlessly and dotes on her blatantly, making their romance known to everyone. Having lost his precious lover, the regretful childhood friend cries and begs her to come back. The female lead takes out their marriage certificate and refuses him firmly, telling him it is already too late.