After running up the stairs, he breathed heavily.

She loves writing fan fiction.

Recently, his popularity has been increasing.

I could see the beautiful sea from the porthole.

He thought he was smart, but he remembered the proverb 'a fool may give a wise man council', and understood the importance of listening to others' opinions.

I went to the stationery store to buy new letter paper.

A mass noun refers to a noun that cannot be counted.

He spread the sheets on the bed.

He took out a thousand yen bill from his wallet.

The new edition of this book has been released.