Orville thinks his girlfriend derives more benefits from their relationship than he does, even though he contributes more to the relationship. orville most clearly believes that their relationship lacks

I believe the answer is: Equity.
In a relationship, equity refers to a relationship that offers mutually beneficial things for one another.
By being in equal relationship, both partners involved would enhance the quality of their life and increase their likelihood in finding true life fulfillment.

Japan's government is dictatorship.