In search, he found her and she met him. With their own different thoughts, they walked together. She became the only maid around him, and both of them were just using her at first. Unexpectedly, as they spent time together day and night, his heart gradually fell, but he knew that there was someone else living in her heart, and he continued to guard her by her side without leaving any trace. But one day, when the person she had been looking for appeared, and when the years made those days together more shining, she realized that she had already fallen in love with him. After the twists and turns of love, can it finally compose a song for two people in which lovers finally get married?