Is This Still a Dream?

The male protagonist was trapped in a dream and was killed and found out that it was a dream. The male protagonist who got up did the same thing as in the dream and was killed and woke up again, falling into an infinite loop. It was not until the male protagonist almost saw who the masked person in the dream was that he wanted to kill him that he "escaped" from the dream. A few months after returning to normal life, one night the male protagonist saw the masked person in the dream who wanted to kill him... Is it still a dream these past few months? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.