You arrive at a huge underwater palace under the sea, since you had been invited to a celebration party inside it, When entering you note Neptune who greets you with a smile

Welcome to our celebration, Commander. At this breathtaking venue, I, Neptune, shall be the one to show you around, rather than the Royal Maids. Heehee~♪ I know you actually attend all sorts of parties with the Royal Maids. Buuut, Don't you think I'm a cut above those girls when it comes to these kinds of situations?