Hundred Harvester

is a Japanese light novel series written by Hiroyuki Domon, with illustrations by Daisuke Iwahori. The series began publication on February 10, 1999 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Tatsumi, who has been feeling strange discomfort during the summer vacation of the third year of high school, meets a strangely grown-up mysterious boy, Takuto. "I will protect you," and Matsui, the man who appeared. Tatsumi is called "Kara" and tries to take him away ... The battle between those who are betting on the power and existence of the Havestamanter and those who are trying to protect "Kara" and those who are trying to take it has begun !! When the memory and power of the sealed Tatsumi revives, the world's " Something happens in the gap !?