This is the 1124th most frequent Russian word.
хорошей
"Хорошей" is the feminine instrumental singular form of "хороший," meaning "good."
The word 'хорошей' modifies 'часы' to describe them positively as good-quality objects.
У тебя очень хорошей часы.
You have very good watches.
The word 'хорошей' describes the noun 'ресторан' to indicate that it's a place of high quality or standard.
После работы я пойду в хорошей ресторан.
After work, I will go to a good restaurant.
The word 'хорошей' modifies 'историей' to detail that the story mentioned possesses favorable qualities.