(from ebookjapan):

Murasame, a banking robbing mobster with two previous convictions, escapes from the police to the home of Dr. Mephisto, a black market scientist who tells him that he will die in a week.

Muraame then uses the time machine invented by Dr. Mephisto to travel forward in time to his own death one week later. What will Muraame do to change his own future?　

A collection of 7 masterpieces of SF and detective mysteries!