Level One Bookworm! Ask for the title of the book…Awesome, just answer it

I used to read it in a pirated bookstore. The name in the book was Death.
Is it about the male lead having dinner with the female lead or something?
And then a man with a gun. The bandit wanted the female to leave and the male protagonist to stay.
Then, she accidentally shot the male lead to death. Later, the male lead was taken to another space by an old man. He was given a scythe. He saved an old man in another world who only had one granddaughter.
After the male lead took the little girl away, A few years later, the little girl looked like the protagonist's ex-girlfriend.
It was because he wanted the male lead to kill the younger brother of this god who had sent him to another world!
After the man completed the task, the woman died but gave birth to a son.
Later, he returned to the human world and his ex-girlfriend became a policeman. The kind that could kill bandits instantly. Take a necklace and come back to save someone.
Is this detailed enough? Please tell me the name of this book…

Answer 1

Awesome, just answer it!