In My Rebirth, I Sold Insurance to a Rival Company, and They All Broke Their Defenses.

Overlord Novels Rebirth Novels

The male and female protagonists have good backgrounds. They don't need to have any exaggerated vestments (the male protagonist is the boss, the female protagonist has a job and is outstanding in this field), and they don't always have green tea to find trouble. The plot is compact and not procrastinating. The male protagonist dotes on the female protagonist. It's a sweet story about ordinary life.