Invite Aqua to join them!

"Kazuma? Where are you at?" Aqua shouted, approaching the bathroom.

"Megumin and I are in here!" Kazuma shouted.

"Oh, bathing together? That's nice!" Aqua shouted back. "Guess I'll just put the money away for now!"

Kazuma's perverted mind of course had other ideas. "Just set it down for a moment Aqua... Why don't you come on in?" he called to her.

"Oh, okay!" Aqua replied, opening the door. "...did you want me to join you in the bath or something?" she then asked, like it wasn't obvious.

"No, we were waiting on someone else actually," Kazuma deadpanned. "Their name is "Shit Sherlock," first name "No.""

(You guys should know the drill by now with the references XD. I just love to make them!)

"Okay, okay," she rolled her eyes as she started to strip down.

"...what kind of name is that?" Megumin blinked as Aqua got naked.

"...you know, it's a good thing you both are sexy," Kazuma chuckled.

"Why thank you!" Aqua chimed, discarding the last of her clothes.

"...that wasn't a compli-" Kazuma started to say, before deciding to drop it, even as Aqua sniggered before sinking into the water.

"So then Master, you got two sexy naked girls with you in the bath... How do you want to play this?" Aqua winked slyly at him.