LOVE FOREVER

The year is 1999, and in Tokyo, there is a scientist. To fulfill his ambitions, he performs magical rituals in his lab basement.

Meanwhile, you play the role of Masato, a regular high school student but very good at martial arts and kendo. After winning the national kendo tournament and defeating your best friend Ukyo (who is the son of this scientist as well as your finals opponent), you go to a cute girl called Sayaka, who you fell in love with, and state your confession. Surprisingly, Sayaka also have feelings for you so the 2 of you come along together very well. This all happens on June 1st, 1999. It all goes well and peaceful for 2 weeks until the absurd comes when serious of weird things and suspicious people start to evolve around you both. To make things short, the two of you run away to your room to "escape" all of these happenings, but unexpectedly a familiar shadow pops up in the darkness....this is just the prologue of a tragedy and a nightmare.

(from AnimeDensetsu)