(from ebookjapan):

The title story is about a young man who tries to destroy "Yamabiko 13," a machine that remembers all the pasts of all the people in the country, and three other works are included in this collection.

Hashi Wataru's girlfriend, Rei, has to undergo a heart transplant operation due to an accident, and during the operation, someone strikes him on the head and he passes out.

When Wataru wakes up, after having his whole body skeleton photographed, he is pushed down by a mysterious beautiful woman and...?