[Another bonus! As long as Laura allowed it, then he'd definitely exploit the chance to squeeze her boobs as much as he wanted. Getting away with that at school was another benefit. As long as they weren't getting anyone's attention... Though whenever she brings up that important fact, Kotarou pulls his hands away and listens to her.]

--Mermaid magic, huh? That sure is really convenient! I was kinda wondering how we'd be able to, y'know, do it whenever we're around water.

[He could've mounted her on the beach, but he felt that probably wouldn't had been comfortable for Laura. But the idea of underwear sex had also sounded really appealing too... Whenever it came to new experiences, Kotarou was willing to give it a try.]

Alright! Let's give this a go and I really wanna spoil your boobs more... [Taking a deep breath out of instinct, he slowly dips himself underwater. Strangely enough, he couldn't feel water filling his ears and nose... Then he inhales to see if he's really breathing. A grin on his face crawls on his face as he could see that he really was breathing normally and it felt like he could speak too. This would be less of a hassle than having to rewrite himself to breath.]

Man, I never would've dreamed that I'd be able to breath underwear. You really are amazing, Laura!