[Machine Translation] --That day. No one believed that the world would really end. Prologue: It was September, the end of summer. Rumors of the end of the world were whispered around the world, mainly via the Internet. Of course, few people believe such rumors. But even if they did not believe it, there were many who were secretly anxious and hopeful. Vague anxiety and expectation that something might happen on that day. The protagonist was not interested in any such rumors. All that mattered to him was protecting his dead best friend's sister, ...... a makeshift sister who thinks he is her dead brother. However, a classmate he met at a preparatory school asks him for advice, and he ends up creating an informal circle called the "9.29 Countermeasures Council. The purpose of the circle was to discuss whether or not the rumors of the end of the world that are currently being talked about on the Internet are true, and to come up with a countermeasure. It is the anniversary of his best friend's death and his "sister's" birthday... [players: 1] (CERO Age rating: To be determined)