First two panels are actual scenes from the trial of water in the game, so there are official english translations for those lines (and the repeated lines in the following gags), but I don't remember what they were so I just translated from the Japanese. If anyone has the exact official English translations for the scene, it would probably be better.
Welcome to a couple's restaurant.Please investigate that water spout.Fufufu... hook, line and sinker.Welcome to the Trial of Water!Could you go with me?Fufufu... hook, line and sinker.Fufufu... hook, line and sinker.My parents want to hire a part-timer. Want to try it out?Ooh, so you're our little girl's boyfriend?Oh my, what a handsome boy.That restaurant gives discounts to customers who go as a pair.