The heroine is not a doctor, a cook, an embroiderer, or a businessman - she is a materials engineer with extremely high professional barriers.
The core technology is orthopedic repair (bones, prostheses, orthotics), not universal medical skills
The male protagonist is not a prince, a general, or an emperor - he is the son of a demoted minister with disabled legs.
No space, no system, no cheats, all relying on real technical knowledge
The heroine obtains social status by monopolizing technology, not by beauty or dependence on men.
