Mizusawa Karen, a very skilled archer, was taken in 5 years ago by her father's good friend, the head surgeon of the Tokyo police department medical hospital. On her 16th birthday, however, her adoptive father tells her that she has a bomb implanted in her heart that is set to go off in a week. Now she and two friends must find her real father to have any hopes of surviving...

Note: Published in Shuukan Shoujo Comic 1990 #12