NegoLove

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!

[From Steam]