Three Years as a Simp to Activate the System

A man is transported into Leo Smith, the son of a general in the Empire of Flame. In just three days, his entire family is set to be executed. At the height of his desperation, the system redirects his objective to Layla Sanchez, his former fiancée, only for him to discover that her affection is already maxed out. In the end, Leo uses modern weapons from the system store to seize the capital, overthrow the emperor, and claim the throne for himself.