Being the strongest in the world is boooring. Okay I have decided. I will have 10 wives.
Can't solve a political issue, don't worry I will help you but in return be my wife.
Demon beast horde attack, don't worry I will save you but in return be my wife.
Can't get strong enough, don't worry, come to me. Your husband will help you.
This a story(more like a parody for all stories) of the will...