Su Yu, a doctor of science and engineering, traveled through time and became a hostage of an enemy country, and was forced to disguise herself as a woman to marry Tang Yao, the princess of war. In order to survive, he developed a black-tech women's clothing artifact, but Tang Yao seized the handle and started a domestication play. When he used magnetic fake breasts to hide gunpowder, she was laughing; when he used his skirt to block the sword, she was recording; when he said for the seventh time, "I will definitely change into men's clothes this time," she tore open her wedding dress to reveal her armor: "My beloved, my betrothal gift is your history of women's clothing."