If you liked the Aria the Natural anime, the Anime-Planet community thinks you'd like:
Alpha, an abandoned robot, runs a small shop in the backwoods of Japan. With an ever-present lack of customers, she passes the days enjoying the little things in life, such as the smell of freshly brewed coffee, and conversation with her neighbors. But when a typhoon emerges and damages the shop, Alpha decides to embark on a journey to see other parts of Japan, expand her horizons, and explore other aspects of life.
Yokohama Kaidashi Kikou: Quiet Country Cafe and Aria the Natural are two shows about absolutely nothing. Both have pretty graphics and music. Warning both may cause drowsiness. If you liked one you'll probably like the other.
Shy, crybaby Fumi has just transferred into Matsuoka Girl’s High School, in the city of Kamakura. It’s been ten years since she moved away, leaving her dear friend Akira behind; and soon, the two are reunited once more. Akira is now attending Fujigaya Girls’ Academy, though she and Fumi still manage to see each other regardless. Between classes and social engagements, the two will experience love, the struggle to admit one’s true feelings, and the joy of companionship.
If you enjoyed Aria, you would definitley enjoy Aoi Hana. The mellow and easy going atmosphere coupled with great relaxing and easy-on-the-eyes animation makes them perfect for just chilling out and taking a break from the common exciting and colorful shows!
A young woman quietly falls to the earth, escorted by a solitary crow. This sort of dream, as many other before have dreamed, comes just before being reborn as a Haibane, a charcoal-winged angel. On the outskirts of the walled-in city lies Old Home, a haven for Haibane to study, live, and learn, while waiting for their chance to ascend to the heavens and escape the confines of their new world. Rakka is the newest inhabitant of Old Home who wants nothing more than to remember her past and discover the secrets of her kind. Together with Reki, Kuu and plenty of other new friends, Rakka will laugh, explore, and search for the meaning of their existence in the process.
While the moods of each anime differ (Haibane is darkish while Aria is sunny) they both focus on the day to day lives of a single character walking towards their goal. Both anime manages to immerse you into the setting and environment of the anime such that you either feel you'll feel that you're a part of the world they describe.
Hazumu is a shy and quiet boy who loves flowers and is forced to rely on his tomboy childhood friend Tomari as a bodyguard. Yasuna is the prettiest girl in school but she avoids men like the plague… until she meets Hazumu. Encouraged, he confesses his love; heartbroken, he heads for the mountains to be with his flowers. As if Hazumu’s troubles aren’t enough, his day is further ruined when an alien ship accidentally kills him. Luckily, alien technology exists that can revive him, but not without a price: Hazumu returns from the dead, but in the form of… a cute girl?!
The future is dull and bleak without the existence of Steel Angels. The rain pours hard and heavy on more days than not and has an acidity to it that keeps most tucked away in their homes. Life is especially dull in the home of High School students Kurumi, Saki, Excelia and Karinka. When Kurumi comes home from a school club meeting with a blush to her face and a lovestruck expression, all the girls gather around, prodding for information. Kurumi has fallen head over heels for a boy named Michihito Kagura, and with the support of her friends she gathers the courage to tell him. But is Kurumi's love strong enough to withstand what fate has in store for her?
If you enjoyed any of the Aria series, I am almost sure you'd enjoy the similarly lax and peaceful atmosphere of SAK: Zero. Aria and SAK: Zero are great at portraying, well, not much at all very peacefully.