What the hell are you?!

Lance is the Prince of Altea the under water kingdom he's a merman and looking for his soul mate. Keith's a high school student and is deathly afraid of the water but what happens when he and his older brother Shiro move to Cuba on their own little beach and a tiny two person house?? And what happens when Lance senses his mate but their out of water??? I own none of the Voltron characters. This idea is so original *insert sarcasm* There will be Mpreg in here. Top Lance and Bottom Keith. Dominate Lance and Submissive Keith.