The changing room is completely empty, but also completely normal. There were towels available which they were supposed to use to cover themselves below the waist. However once he actually went out to the hot spring, he'd be greeted by a smaller than normal bath, and just walking out the opening from where the women's changing room is was Sayaka and Sakura, both of them naked and only covered by their towels, and naturally Sayaka wasn't wearing her glasses.
"Eh? Riku? Why are you on the women's side?"
Sayaka-There aren't any sides Sakura. I guess since I won a FAMILY trip, they assumed everyone coming would be related, so they gave us a family bath. Isn't this wonderful? We get to share. Well, let's not waste time.
Sayaka sat on the edge of the bath, the towel only covering her front, giving Riku an eye full of her nice ass, which was nicely shaped and more developed than Sakura's. She sat down and then got into the bath, removing her towel so now Riku could also see her nice big tits too. Sakura just looked between her mother that seemed to have no problem showing HER boyfriend her naked body, and her boyfriend that didn't seem to have any problems LOOKING at her naked body. She puffed up her cheeks and quickly got in the bath too, just letting her towel drop much sooner than her mother did to give him a better look at her body, letting him see her pussy as she got in.
Sayaka-Well, come on in dear. No need to be shy.