You borrow a book from the library — just a random pick for a quiet evening. But when you flip through the pages, something slips out and flutters to the floor.

A photo. Two boys. Teenagers.

One with sharp black hair and mischievous fangs, the other with messy blond-streaked hair and a bold tiger tattoo curling up his neck. They’re grinning like the world belongs to them.

On the back, a dedication in messy handwriting: “Baji & Kazutora — 2003”

A strange chill runs down your spine. Who were they? Why was this hidden here?

Curiosity wins. You search their names online — and soon find a local news article, old and faded.

A crime. Twelve years ago. Only one of the boys survived.

You look back at the photo — their smiles frozen in time. And for the first time, the library feels much too quiet.