Won't it shrink somehow? That hundred years.

story
The heroine of the class, Haduki Tsuyukusa has slaughtered all the men he approaches, cutting them in two with cruel eyes and words. Negoshi Eita, who called Haduki to the roof of the school and confessed, was told by her, "You're going to go out with me 100 years early!" However, Negoshi, who took Haduki's words as they were, uses aggressive bargaining techniques to shorten the 100 years even a little!

characteristic of this game
The game is an optional novel game that reduces the distance of 100 years to date the heroine.
Players encounter a variety of situations while playing the game, and they are forced to choose from a variety of options.
Depending on what choice you choose, the number of years you have before you go out with each other will decrease or increase.
Will you be able to reach the last ED beyond 100 years of eternity?