"Aria" x "Amanchu" Miracle Collaboration

On the planet Aqua, a world once known as Mars, Akari Mizunashi has just made her home in the town of Neo-Venezia, a futuristic imitation of the ancient city of Venice. In pursuit of her dream to become an Undine — a gondolier who leads high-end tours around the city — Akari joins as a trainee with the Aria Company, one of the three most prestigious water-guide companies in Neo-Venezia. There, she explores the beauty of the city and the world along with other trainees from Aria and rival companies, working hard for her dreams and making new friends along the way. (Source: TOKYOPOP) *Note: Includes seven extra chapters.*

Hikari Kohinata is a cheerful 15 year-old girl who lives near the ocean and she spends much of her time diving as a result. On her first day of high school, she meets a teacher who also likes scuba diving. There's also a 16 year-old classmate, Futaba Ooki, who gets dragged along in Hikari's maelstrom as soon as they meet at school.