Time in an Hourglass

Female lead: If only the hourglass could stop. But it is the sand slipping away that makes me realize just how much I love him.

Male lead: I will forge my love into the strongest wall, shielding her from wind and rain. As long as I live, I will be her guardian forever.

The female lead, Mu Luo, and the male lead, Mu Yi, are both members of the Mu family, which is in the silk business. They are not related by blood: she was adopted. This also ties into the love and grudges of the previous generation.