He is always grumbling about trivial things, it's really annoying.

There are no words to describe that beauty.

Strong interaction is one of the four fundamental forces in particle physics.

Sannen is my best friend, and he is a very interesting person.

Kou Sennen is my best friend.

I was able to know the truth of the hundredth year.

We go on a family trip once a year.

There is a Citrus nobilis tree in my garden.

We are in a marriage with an age gap, but our love is deep.

This fountain pen is my favorite.