Both POV

Draco watched the expressions running across Harry's face as he came up from the depths of the tub. He knew he'd been caught and that he was going to have to explain this to Harry as well as to get him to agree not to tell anybody else. When he finally breached the surface of the tub, Draco had no time to get any words out before Potter started talking and questioning him.

"What the hell are you Draco? One second, your you, the next your legs are replaced by beautiful green fins?" Harry questioned.

"Harry, my father told me this would happen to me on my 16th birthday. He told me that this has been going on in my family for centuries."

"So what, all Malfoy's become mermaids?' Really? You expect me to believe that crap!"

Draco stiffened and raised his head, "I prefer the term merman."

"Wait, were you here in the bathroom a week ago?" Harry asked, suddenly very much aware that yes, Draco in his mermaid- wait, merman- form would not show up on the map since mermaids are magical creatures and the map only shows people or people that have used magic to transform into animals.

Draco blushed and a sheepish grin spread across his face, "Yes, Potter. I was here in the tub that night a week ago."

"So that means that…" Now Harry was the one doing the blushing. "How much are you able to hear under the water?"

"I heard everything Potter," Draco smirked, "and I also don't miss much. Like I didn't miss it earlier when you called my fins beautiful." Draco finished that last sentence by flipping his fins out of the water and splashing Potter with them.

"Hold on a minute, then if you really were the one under the water that night, that must mean that you are either very sadistic, or that you like me as much as I like you."

"I, uhhhh…" Draco turned an even deeper shade of red as he tried to avoid the question. "God, fine. Yes, Potter I like you okay? In fact, I've fancied you for a while now."

"Good," Harry said as he walked over to where Draco was lounging on the side of the tub.

He grabbed Draco's face and planted a long kiss on those gorgeous lips of the Slytherin. Draco moaned into Harry's mouth and opened his lips a little. Harry took that as his cue and stuck him tongue into Draco's mouth. When Harry finally pulled away, Draco groaned with sadness.

"Didn't you say something about it being your birthday?" Harry asked with a sparkle in his eyes.

"Yes, Pot- Harry. Today is my birthday. My birth moment was the moment that you saw me transform into a merman. That moment I gained my full powers and the ability to control when I have fins unlike before when they would appear whenever I got wet."

"You used my name?" Harry was stunned.

"Well I figured seeing as how we just admitted to each other that we like the other person and the blowjob last week that we could finally get onto a first name basis."

"Great! I'd like that Draco." Harry gave Draco another kiss on the lips. "How about we celebrate your birthday and our newfound respect for each other somewhere else."

Draco got the hint and left the water. He closed his eyes briefly as he removed his fins. Draco quickly put his robes back on and let Harry take him out of the bathroom under his invisibility cloak and to the Room of Requirements. The room gave them exactly what the needed at the moment: a huge, comfy bed for the two of them to use.

Draco felt that Harry wasn't moving fast enough for his liking. He pulled Harry towards him and kissed him. This time it was Harry that moaned and opened his mouth to allow Draco's tongue to slip in. So much better than any fantasy, they both thought. Harry felt Draco's hands tugging and his robes. They both broke apart long enough to get each other out of their clothes. As soon as they were both naked, they came back together to continue their kissing.

Harry could feel Draco's erection on his own and could also feel himself getting harder by the second. Harry moved his hands down to Draco's erection, only to have his hands pushed away.

"No, Harry. It's my birthday so we're going to do things my way," Draco's eyes sparkled. He shoved Harry playfully onto the bed and got on top of him. He started planting kisses down Harry's chest. He stopped to nip at his nipples, eliciting groans and moans from the man underneath him. He kept his kiss trail going all the way down, but never touching Harry's hard cock.

Draco reached out from the bed and grabbed the lube the room so generously provided for them. He popped the lid and squeezed some lube onto his hand.

"You ready for me Harry?" Draco asked as one lubed finger circled around Harry's opening.

"God, been ready," Harry responded thrusting towards the finger, trying to impale himself on it.

Draco pushed his finger in, loving the way Harry looked beneath him. He moved the finger in and out and slowly added another. Then he added another, opening Harry wider to prepare him for Draco's cock. Draco made sure to hit the prostate on his way out, causing waves of pleasure to ripple through Harry.

To his disappointment, Harry felt Draco's fingers leave him. He was about to complain when he felt something much bigger press against his hole. He relaxed as much as he could, knowing that this was going to burn a bit. Draco slowly pushed through the first ring of muscle to minimize the pain, and then thrust in burying himself in Harry.

"Oh God, Harry. You're so tight and warm," Draco groaned.

"Please, Draco. Fuck me!"

Draco started thrusting, creating a pattern that Harry was easily able to follow. Draco then changed the angle, making it possible for him to hit Harry's prostate with every thrust. Harry didn't know how much more he could take. He felt himself reaching the edge. A few more strong thrusts from Draco had Harry coming harder than he had ever come before. His orgasm rippled through him, causing him to clench down on Draco's cock.

Harry clenching around him was more than Draco could handle. With one last thrust Draco came inside of Harry, screaming his name as he came. Draco collapsed on top of Harry, both of them panting and out of breath. When he was able to, Draco slowly eased himself out of Harry and lay down next to him. Harry moaned as Draco left his body, already missing the feeling of Draco's cock inside of him.

"Happy birthday Draco" Harry said.

"Thank you for my wonderful birthday present Harry" Draco leaned over and kissed Harry before laying back down.

They managed to clean themselves up a bit before falling asleep. Harry woke the next morning aroused and with Draco's fingers inside of him. He groaned as he turned his head to kiss Draco.

"Morning," Harry said as he kissed Draco.

"Morning," came the response as the fingers were replaced by something bigger and better.

When they were done, they both realized that they were going to have to explain this to their friends somehow. They decided that the best way to do it was to just come right out and tell everyone.

They stood in front of the door to the Great Hall holding hands.

"You ready for this Harry?"

"As long as I get to be with my merman, I'm ready for anything."

Draco planted a kiss on Harry's lips as the doors opened, revealing to all there the new relationship that had started. Draco released Harry's lips and grabbed his hand once more as they walked together into the hall and towards their future.