Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
A letter without a postmark.
The last letter from the pen pal Fumino 亜弥 who was not opened.
"I have killed a person.
I have to pay for the crime.
This is goodbye. Good-bye."
What happened to her 15 years ago?
The clue to the truth was a letter from her and the testimony of her seven classmates.
Is her pen pal an angel or a demon? Where is she now?
A youth suspense made by reminiscence and reality.
The truth is endless.