Aa! Megami-sama! (TV), Ai Yori Aoshi Recommendations
Both series are lightly comedic romances (with harem elements) in which a fairly ordinary college student is suddenly visited by a beautiful yamato nadeshiko type woman who becomes his romantic partner.
These are really close in the story line the main couple meet in the beginning and then the rest of the story is about how they they live. Both shows have a bunch of other girls that come in and mess up the happy relationship the main couple have. And lastly they are both heart warming and funny.
Ah! My Goddess is mostly about the pure relationship between Belldandy and Keichii. You will find a similar boy meets girl, girl and boy fall in love, girl and boy go through obstacles plot line in Ai yori Aoshi
Guy meet a girl, star to live with her and they fall in love with each other
boy falls for girl, girls have to hide their relationship to friends
A college guy has a woman suddenly appear with plans to spend the rest of her life with the guy, she cooks and cleans at the place they now live at, and a harem starts popping up.
Ai and Belldandy, both share the same traits;t their unconditional love and devotion to the main male lead.
Both anime involve female characters who suddenly step into the male protagonists lives and transform it. The primary difference between the shows is simply the fact that one is a Goddess.
These anime is similar in many ways, they are both slice of life series and have the same romantic tones to it. The main woman character are also very similar in character in which they are loving, caring, and gentle in nature. I don't want to classify them as nadeshiko because it would be a disservice to Belldandy and Aoi. I think chances are of you like one you will like the other
Ah! My Goddess is literally what Ai Yori Aoshi would be if the girls in AYA were goddesses, and if the harem elements were much more subtle.
There are many similarities:
Both girls meet boys in beginning, live with them and fall in love.
Later other girls join in the picture but are not necessarily big competitors for protagonists' affections.
Both girls are Yamato Nadeshiko and are great homemakers.
They both can be pretty badass and defend their love in trying circumstances.
Both are romantic, harem comedies