Aria The Animation, Shinigami no Ballad. Recommendations
Both are pretty chill series with some nice stories. If you liked one, there's a good chance you'll like the other.
While Shinigami no Ballad focuses on death and the effects of the lives of those after loved ones perish, and Aria focuses on life as a gondola boatsperson, both have very similiar aspects. The laid back slice of life, moral-of-the-story type anime makes both likeable. Personally, I prefered Aria, but both are decently enjoyable if you are looking to ease a day's stress away.
Both are slow, relaxed, sleep-inducing short anime of the slice of life genre and with basically no character development at all.
Even though Akari & Momo have opposite personalities, both of them come into contact with many people because of their work, and always try to help them.