The Feasibility of Subduing an Overbearing Dragon A [Female B, Male E]

The female lead doesn't respond to pheromones

Probably a melodramatic old-school story. It's short, but packed with tropes.

An ABO setting with some mechanical augmentation elements. The female lead has a non-original body part (not that kind of part).

Theme: When a flower is ready to be plucked, pluck it at once.