It's a convoluted time travel- end...in other words? Classic Nagai. We hope you enjoy Chaos's excellent TL as he's the one who turned a lot of things about this manga into readable quality for English. Without his efforts, this manga could never have been done, let alone ddoe well!
And a thanks to everyone else who worked on it, all throughout the years from Dynamic Pro, to a1oner, to Yuma...this wasn't an easy one to finish, but now? We present it to you!