Need your help with the Beach Episode (Early Idea) (Patreon)

I need your opinions with this one. Here's just a quick sketch to get a general idea of how I may do the drawing. But yep, I wanted to do the Beach Episode!

I just wanted to have Uchi in the front building a castle in a cute bikini, and Creah at the back doing something more. Should I just put her there standing and looking pretty or something else?

Also, should I add anything else or what would you like to see here?