She's so deep underwater her clothing has vacuumed itself to her body

anon submitted:

Summer Julietta is also made of rubber.

So besides the boobs and butt pose, what's holding her swimsuit to her chest like that?  Special water-proof body glue?  Underwater pressure?  (Also I think one boob might be an egg)

(Promotional art from Dragalia Lost, Cygames)