He became a millionaire at a young age.

This new app is suitable for everyone and their mother, and anyone can use it easily.

This new game is made for everyone.

She was a secret kunoichi (female ninja).

He threw a handful of sand into the sea.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.

He was focused on his work all day long.

One day, he suddenly decided to go on a journey.

No one knows what he did to spend one day.