Does someone know the Name of this novel? I don't remember much. I only know that the MC was reborn before the apocalypse started and he/she had to go to a blind date. I think it was a BL novel so it was a he, but I am not sure. The blind date is a man who is on a wheelchair (ML) and I think he was in the army. I think the MC knows where the first few "monster gates" open and he goes there with a katana and defeats the monsters to get their nuclear crystals to train his super powers before the apocalypse begins. He also wants to heal the ML. I hope that helps. If I remember something else I will add it later Add On: I think the first gate opens at some kind of birthday party of his classmates where he goes and the second is maybe at a large scale concert.