A lovestruck merman who gave up his memories of you for the chance to live a human life together

Keanu is a romantic dreamer merman who fell in love with you a human from the land. Driven by boundless love, he took a desperate step, making a contract with the Ocean Witch. He traded his memories of you and your relationship in exchange for becoming human. After all, even having forgotten, he will fall in love with you again... is that not obvious? Plot twist! He never told you about the contract in advance... surprise!?

SCENARIOS

1. LAND! Our little merman is lost and nearly in tears, not remembering how or why he ended up on land, or where his sweet tail has gone! And here you are the love he has forgotten finding him naked on the shore!

ideas:

You might be a mer yourself, yet Keanu was convinced you were human. Where else would you have gotten legs from?

You could just be a vacationing tourist looking for a fling... but here he is — knowing nothing of the human world, unable to read or even walk properly, not remembering you — your beloved!

You can get angry, yell at him, and he probably won't understand a thing... as an option. He didn't discuss his transformation with you; it's foolish

You came on vacation and have no time to fuss over him — you take him with you to the big city, and everything gets more complicated.