Spring is beginning to bloom in Neo-Venezia, bringing with it sunshine and warm breezes. Akari, Aika and Alice are out practicing their sculling when they find a small treasure box hidden by a statue. Inside there's a a simple little riddle that sends them off on a treasure hunt that spans the entire city! What sort of riches await them at the finish line?

A short promo that aired after the first six episodes of Aria the Natural aired on AT-X.

Akari is taking customers out for a tour! Alicia is along to help, of course, and it's a good thing she's there. When the tourists start asking questions that Akari doesn't know the answers to, Alicia answers them with ease... but this worries Akari. Will she ever know the city as well as Alicia? This sparks a fire in Aika and Alice as well - they've decided to compete to see which one of them knows the most hidden wonders in Neo-Venezia.

Many of the water touring companies in Neo-Venezia have their own palina - a tall, decorated pole used to hitch gondolas. But strangely, the Aria Company doesn't have one. When Akari asks Alicia about it, Alicia gives her full permission to make a palina of her own! It's tough work building something from scratch, but Akari is determined to make the best palina possible.

Even though Akari is relatively new to Neo-Venezia, most of her friends have lived in the quiet island town all their lives. One sunny afternoon, as Akari, Akatsuki, Akria and Al are all eating lunch together, Al tells a story about when they were children, and the mysterious young boy who put Akatsuki squarely in his place.

As summer begins to wane, Alicia and Akari give a tour to an elderly couple who have come to Neo-Venezia to celebrate their anniversary. Although the woman is sweet and charming, the man is a bit of a grump. He orders her around, doesn't seem interested in sightseeing with his wife, and just acts cranky in general. But things aren't always as they appear... Even though he's tough on the outside, he still wants what's best for his wife, and it's up to the girls to help him set up a celebration that she'll remember always.