This anime focuses on the daily life of an Undine (boat rower like a gondola in Italy) named Aria and her friends who show the beauty and friendliness of the residents of her city named Neo Venezia. So that we will be made comfortable and peaceful every time we see this anime. If you've ever watched Natsume Yuujinchou especially when he was narrating or maybe the Tamayura Anime, the atmosphere is exactly the same as that. This anime has a light story, the comedy is also light not to make you laugh out loud but can make you always grinning while watching (lol).
I think it's very fitting to watch when you're tired, just 1 episode is enough to eliminate or reduce fatigue. This anime is also very Italian, so there will be a festival and a kind of folklore that is in Italy raised in this anime.