Commanded to Scheme for a Husband

I'm clearly a fish, so how did I turn into a person?! What? Being human comes with a mission?! I have to marry a specific person. And I have to find that person myself! But why do I have to go to school, grow up, and get a job too? A fish swims through the martial world, always at risk of getting stabbed! What should I do? Dodge whenever I can. If I can't dodge? Then I'll take one stab and return two!