Oligarchy is a political system where a few powerful people rule the country.

He likes to take a walk in the park at dusk.

Hisafu is my best friend.

Fukiho is my best friend.

We should always remember the power of Kannon in difficult times.

He was swimming freely as if he was a fish playing in the pot.

Polyandry is a social system where one woman marries multiple men.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.