My Wife Is the Savior

The world is on the brink of collapse, and the Dragonfolk are coming... In short, Earth is doomed, and humanity is fighting desperately for survival... What? His future wives will be the saviors, but he's just an ordinary little research assistant. How could he possibly have that much appeal... Wait, not one future wife, but wives? Emmmmmm, you shameless author, don't tell me this is going to be a tragedy. I promise it'll be a light comedy with no landmines, otherwise, who would keep reading...