Un : BIRTHDAY SONG ~ Ai wo Utaeru Shinigami ~ another record [Normal version]

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

An ordinary girl who has a common life.
One day in front of her, two unknown men suddenly appear.
The men dressed in strange clothes told her.
"You have only one month to live."
The protagonist who followed the fate that had befallen him and had to hand over his soul to them who called himself "Shinigami".
But before that, she had a wish that she could do by all means.
How does the protagonist live for the last time left in his life?
And what are the actions taken by Shinigami?
A sad love story spun by the elite of Shinigami.