His room is always so clean that there's not a speck of dust.

It is difficult to find the optimal solution to this problem.

He has a contrarian nature, doing the opposite of what people say, like an amanojaku.

The soup with mixed small fish at this restaurant is very delicious.

He excels in every aspect of his job.

Looking at his various expressions, I felt that he was hiding something.

Geography class is my favorite.

He is an expert in geography.

He finally recovered after a long period of medical treatment.

He went to the doctor to treat his severe cold.