A/N: Okay so the first part is a moment that has been in my head for years and I never found a place for it until now. On principle, they have to have a relatively intimate moment before he leaves. Have I made it clear yet that he's helplessly obsessed with her hands? If not, here's more.

The second part: I rewrote Leo's POV of the leaving scene from the book. All the same dialogue and everything. Please don't hate me for it. I just had to give it juice because there were parts of it that just needed more.

I don't own any of it. It all belongs to Rick Riordan.

The third day, it was all about making tweaks and changes to the guidance console.

They had managed to get the machine to turn on, but getting it to work properly was a different story. For about half the day, it would turn on, whir a lot, and then die.

"It's the fan," Leo explained. "It's not working properly. The circuit board keeps heating up too quickly."

"Do we need to make a new one?" Calypso asked. "What's wrong with it?"

Leo tinkered with the piece, trying to see what was happening. "I think it's just not attaching to the rest of the wires. We should recoil the connectors."

They began detaching parts and untwisting the wiring on the circuit board. They stood close enough that Leo could smell her cinnamon breath. It was intoxicating. Both sets of hands worked closely together on the circuit board, and he could almost feel the warmth radiating from her fingers.

They hadn't spoken much since the day before. The guidance console project had become a shared one, and yet Leo knew it was really only him who was going to be using it. Calypso was not coming with him, and Leo felt immensely guilty about it. It had become like a taboo to even mention the fact that he was actually trying to get off this island.

Leo really, really did not want to leave.

I have to, he told himself. We have a quest. I'm trying to save the world here!

But it seemed so wrong for Calypso not to come. She could help them. She could leave with him, find the Argo II, and they could finish this quest together. Defeat Gaea together. That's what made the most sense.

But she was stuck here. The only way to get her off this stupid island was if he broke the curse. He had to come back. A second time. Achieve the impossible. It was the only way.

"Which ones am I twisting, then?" Calypso asked, holding the wires she had just unraveled. "Do I weave these together instead?" She grabbed a different wire in her right hand.

"No, the other one, this one – " He reached over to grab the correct wire, and his hand accidentally brushed against hers. In less than a millisecond he felt like he had been electrocuted, dunked in hot coals, and splashed with ice water simultaneously. Leo tried to swallow and found he couldn't. Time seemed to freeze.

Calypso gently took the wire that he had indicated and slowly twisted it with the other wire. "Like this?" She asked. It was nearly a whisper, but he could feel her breath against his neck.

Leo reminded himself to breathe. His ears were ringing. "Yeah," he managed to choke out.

He knew he should probably move, but he felt paralyzed. His eyes were fixed on her hands as they gracefully moved together. He could feel her eyes watching his face, and her hands slowed.

Before he could stop himself, he looked at her face as well and for a split second their eyes met. Heat spread through Leo's whole body and he was certain he would burst into flame. He quickly moved away and grabbed the wires he had been working with before. He cleared his throat awkwardly.

They finished the task in silence and did not make eye contact again.

By the time they had finished the console it was after sunset. They had packed all of the supplies that Calypso had collected for his trip and placed the bags on the beach.

Now, they sat on the sand in the place they had apparently designated as the new dinner spot, ever since the dining table had been destroyed. It was a clear night, and the moon looked huge in the star-filled sky. Leo had made a bonfire, and he loved watching the way the firelight flickered off of Calypso's hair, making it look like a shimmering piece of celestial bronze.

"All we need now is a boat," Calypso said, her eyes focused on the horizon. Her tone was chipper, but Leo felt his heart sink just hearing the words. Leaving was the last thing he wanted to be thinking about right now.

"I can start chopping wood into boards tomorrow," he suggested. "Few days, we'll have enough for a small hull."

"You've made a ship before," Calypso said. "Your Argo II."

Leo nodded. That boat took a long time to build. He hoped this one would take long too.

"So how long until you sail?" She asked. Leo scowled at the question. Clearly she was going to bring up the taboo, whether Leo liked it or not.

"Uh, not sure," Leo replied unenthusiastically. "Another week?" He said, more as a hope than as an accurate guess. A lot could happen in a week.

He watched as Calypso ran her fingers over the completed navigation device, which sat on the ground in front of them. His own hand tingled just looking at hers.

"This took so long to make," she smiled, admiring the piece.

"You can't rush perfection," Leo reminded her.

"Yes, but will it work?" She asked. They had gotten the device to appear to be working, but he wouldn't know for certain until he was away from the island, when he could pin point his actual location on the map. But honestly, finding the Argo II again was the least of his worries. Finding this island again, on the other hand…

"Getting out, no problem," Leo assured her. "But to get back, I'll need Fetus and – "

"What?" She interrupted him.

"Festus," he looked at her. He thought he had told her about him. "My bronze dragon. Once I figure out how to rebuild him, I'll – "

"You told me about Festus," she waved her hand impatiently. "But what do you mean, get back?"

Leo's stomach twisted. He realized he had not explicitly told her about his plan to come back. It had become such an integral part of his quest that he'd forgotten that she didn't actually… know about it.

He scratched his head and laughed awkwardly. "Well to get back here, duh," he tried to joke. She was watching him intently, like she might need to defend herself against him. "I'm sure I said that," he said unconvincingly.

"You most definitely did not," she replied with a dangerous edge in her voice. It hurt a little. Leo supposed perhaps she didn't actually want him to come back. He hadn't thought of that.

"I'm not gonna just leave you here!" He insisted. "After you helped me and everything?" For crying out loud, he thought. You deserve better than this. "Of course I'm coming back," he told her. "Once I rebuild Festus, he'll be able to handle an improved guidance system. There's this astroblabe that I, uh - " he supposed he didn't need to mention it was Odysseus who made it – "that I found in Bologna. Anyway, I think with that crystal you gave me – "

"You can't come back," Calypso said decisively.

Leo felt like he had just been stabbed in the chest. Ouch. He grimaced. "Because I'm not welcome," he muttered, looking down at his hands.

"Because you can't," she insisted. Her voice cracked, and Leo looked at her again. "It is impossible. No man finds Ogygia twice. That is the rule."

Leo couldn't help it. He grinned. So she did want him to come back. She just didn't realize that Leo Valdez could do anything he put his mind to. "Yeah, well, you might have noticed I'm not good at following rules," he rolled his eyes. "I'm coming back here with my dragon," he assured her, "and we'll spring you. Take you wherever you wanna go. It's only fair."

Calypso didn't look so sure. Actually, she looked like she was about to cry. "Fair…" she whispered. She looked down at her knees.

"You didn't really think I could start Leo and Calypso's Auto Repair without Calypso, did you?" He said. It pained him to see her looking so defeated. Gods, she looked so… well... hopeless. He had to get her to smile. To laugh. He loved her laugh. "I can't make cider and stew, and I sure can't sing," he tried.

She just stared at the sand. He couldn't read her expression. He sighed in agitation, and looked back out at the water. He swallowed a lump in his throat. "Well, anyway," he continued, a bit too loudly, "Tomorrow, I'll start on the lumber, and in a few days…" His voice trailed off, and he suddenly noticed something wooden floating in the water, batting against the shore. Was that… a raft?

Before Leo could even process what was happening, Calypso was already running towards the water with two large supply bags in her hands. "Hurry!" She exclaimed. "I don't know how long it will stay!"

Leo stood up slowly. Wait what? He was leaving? Now?

Dread filled his stomach. He didn't want to leave yet! He still had to build a boat! But wait… "That's the magic raft?" he asked. His mind was trying to comprehend what was happening, but it wasn't making any sense.

"Duh!" Calypso yelled back at him. "It might work like it's supposed to and take you to where you want to go, but we can't be sure. The island's magic is obviously unstable."

Huh?

"You must rig up your guidance system to navigate," she insisted. She grabbed the console from the ground and ran back towards the raft.

Leo grabbed a few more supplies bags and ran after her. He took the device from her and helped her rig it to the raft. They connected it to the small rudder in the back of the boat, attached their sail to the mast, and carried the rest of the supplies on board. Everything was happening so fast that Leo didn't even have time to think about what he was doing. He muttered a quick prayer to his father and got the Archimedes Sphere up and running.

"Go," Calypso said. Leo turned around. She was still on the beach.

"The raft finally got here," he stated. Which meant he was just supposed to – leave? He repeated this idea over and over, but it still was not computing. Why was she just standing there? Get on the raft you lunatic! He wanted to shout at her.

Calypso snorted. "You just noticed?" She crossed her arms.

Leo was finally starting to catch up with the meaning of all of this. He was leaving because the raft had come. Why had the raft come? "But if it only shows up for guys you like – "

"Don't push your luck, Leo Valdez," she said coldly. He noticed that he was standing much closer to her than he had realized. She smelled like cinnamon. Her eyes still looked sad. "I still hate you."

Leo tried to read her expression, but it was dark. He had feeling she wanted to tell him something else. "Okay," he said uncertainly.

"And you are not coming back here," she said sternly. "So don't give me any empty promises."

That Leo did comprehend, and he was not going to accept it. "How about a full promise?" He held out his arms. "Because I am definitely – "

And then suddenly her lips were pressed against his and her hands were in his hair, and all he could feel was the sensation of her – her smell, her taste, her touch, her everything – and his insides burned with hot coals and electricity.

Then it disappeared.

When he opened his eyes she was staring at him in as much disbelief as he felt. "That didn't happen," she choked. She looked… terrified.

"Okay," he squeaked out.

"Get out of here," she ordered.

"Okay," he squeaked again.

And before he could figure out if she was angry or sad or scared – she ran up the beach and then was gone.

Leo was feeling so many different things at once he didn't know what to feel. The raft suddenly jolted and he quickly got on, right as the waves pushed it off the shore and sped him away from the island.

He turned to look back at the beach and let out a breath. She just kissed me.

Leo's heart sky-rocketed and then immediately crashed back down.

Styx.

That's right, he thought. Styx. An idea that he had been chewing on rose to the surface again. Something about a seventh wheel, and an oath to keep with a final breath.

So Leo knew exactly what he was doing when he swore it.

"I'm coming back for you, Calypso. I swear it on the River Styx."

A/N: I hope you liked it! Thanks for reading and please review so I know what you are thinking!