Yoo jungyeon and Im nayeon are a happy couple with a six years relationship, they love each other or that what jungyeon thought. His heart broke into million pieces when he received a marriage invitation card with the name of Im nayeon & Park Chan Yeol

He meet a girl named Chou tzuyu who had her eyes on him not a long time ago

She ask him for a date, he accepts in purpose to get over his ex

As time passes the two get closer but what will tzuyu do when the ex appears in her way of getting jungyeon? Will jungyeon forgive nayeon for his broken heart? will tzuyu success in mending his wounded heart?