- Identity Contrast: A street scoundrel vs a wealthy lady. In the early days, there were constant conflicts due to class and habits, but they were forced to bond in troubled times, from "working together to survive" to "depending on each other for life and death".
- Complementary growth: Mu Wu's "courage" and Su Wan's "wisdom", Mu Wu's "roughness" and Su Wan's "fineness", polished each other in troubled times, and eventually became each other's armor.
- Core proposition: With the ultimate goal of "survival", how do two originally unrelated people interpret "family" and "protection" in the simplest way in the midst of war and blood.
