Moka first, then Kurumu.

Moka went into the shallow end as Ichinose casually took her mermaid form. With her being nude, Moka noticed that her pussy was still there, right where human flesh met fish scales. That could be interesting for Tsukane later. "So, the first thing you're going to want to learn is how to tread water," Ichinose told Moka.

"Tread water?" Moka asked, not sure what that meant.

"For this, you'll need to be in the deep end," Ichinose told Moka, who blanched. "Don't worry, I can easily keep you from drowning."

So Moka swam out to the deep end clumsily, Ichinose guiding her in the proper form. Meanwhile, Kurumu was laying on her front with her sling bikini off, getting the massage she had asked for, one girl working on her back and shoulders, another one massaging her thighs and ass, and the third working over her feet. "That's it, good bitches," Kurumu giggled, moaning in pleasure.

"Thank you Mistress, we pride ourselves in our skills," the one working on her shoulders, a cute brunette, giggled.

Back with Moka, Ichinose was having her treading water, and while Moka was still a little clumsy at it, Ichinose was encouraging her that she was getting the hang of it. Tsukane was now watching at the edge of the pool, enjoying that sight. Moka glanced over at him, and then told Ichinose with a giggle, "Go ahead, I can tell he wants to fuck you in mermaid form, I'll call one of your buddies if I need help practicing this."

"Okay!" Ichinose grinned, swimming over towards her Master.