Theo and Helvi enjoyed their underwater stroll, but after about an hour, Theo started shivering a little from the cold.
“I-I guess it’s natural to be cold after being in the water for so long.”
“I see, sorry. I will warm you up.”
“Eh?”
Helvi’s words shook Theo and turned his face red. Or rather, what he imagined when she said them.
Could they do that on that beautiful water? Theo then thought that perhaps the location being so beautiful was more of a reason to do it than not to.
“…Ah. I kind of… Feel warmer.”
“I used magic to raise the temperature of the water around us. It is not as warm as a bath, but it is not cold either.”
“I-I see… Thank you.”
It was a healthy and wholesome way to warm someone. Obviously someone as good as Helvi could easily do this, but it was much different than what Theo was imagining.
His face became even more red as he became embarrassed for even thinking about it.
“Hn? Is something wrong, Theo?”
“N-no, nothing…”
Something was clearly strange about Theo, so Helvi decided to peek into his mind.
She quickly realized that he misunderstood her, and quickly became embarrassed as well, although she could not help but also smile at Theo’s cute thoughts.
“Fufu, did you want me to warm you in some other way…?”
“…! N-no, hum…”
Theo flinched and faced down after realizing Helvi saw through him.
They were holding hands… But Helvi got closer, and hugged Theo from behind.
“Ah…”
“Now you won’t be cold, will you?”
“Y-yes… It’s warm…”
This would certainly make Theo warmer faster than increasing the water’s temperature.
The water’s temperature had no impact on Helvi’s body temperature. Even extreme cold would not lower it.
Helvi was wearing a swimsuit, and Theo was naked from the waist up, so her warm body did a good job warming his. But what warmed Theo even more was the excitement he felt from Helvi hugging him, which increased his blood flow.
“Fufu, were you really cold? Your body is feeling quite warm.”
“I-it’s your fault…!”
Helvi’s face was right next to Theo’s, with their cheeks almost touching.
When he moved his face a little to the right, he saw hers, and their lips got closer…
“Hn…”
“Hnn…!”
Their lips touched.
Over a hundred meters below the surface, they were in their own world. There was no one to bother them, and only coral and tropical fish could see them.
“Hn… Helvi, your lips are warm.”
“…So are yours. Soft and warm.”
Both laughed, before quietly closing their eyes and kissing again.
For a while, in the cold sea, their bodies became warmer.
Quite some time passed, and the sun was setting when they finally returned to the shore.
Both were in the cold water for a long time, but neither felt cold.
Helvi’s magic certainly played a part, but they also warmed each other.
“The ocean’s so beautiful. It was really fun! I want to come here again!”
“Yes, me too.”
“We should bring Celia and Xena next time! The more the merrier!”
“Fufu, maybe. I imagine Celia may even be able to stay underwater without the help of my magic.”
If Celia were present, she would tell Helvi not to be unreasonable.
“C-can I do that someday too?”
“Yes, eventually.”
That ‘eventually’ would take over a hundred years.
“R-really!? Then I have to work harder on my magic!”
Happily announced Theo, before Helvi pat his head.
They had been underwater, but the air covering Theo’s head meant his hair was completely dry.
Helvi passed her hand through Theo’s smooth hair.
“You can count on me to help but… To increase your magic energy, what we really need to do is… That…”
The amount of magic energy one could store in one’s body was limited, and varied from person to person. Normally, it would be very difficult to raise this limit, but all Theo had to do was sleep with Helvi.
By taking advantage of this, theoretically speaking, Theo would have more magic energy than any other human in the world in a few centuries.
“…! I-I want to get stronger, but it’s not like that’s why I do…”
“Y-yes, you said so before. You can stop there.”
Theo did it with Helvi because he wanted to… Is what he told her before.
They would spend countless more nights together, and as their love grew, so did Theo’s magic energy.
The fact that Theo was already stronger than he was the previous day was proof of this.