Narue no Sekai

Both female leads are aliens who end up falling in love with a boy in earth. Also though Onegai Teacher is a bit more dramatic, both have nice comedy touches into them 

Both have alien girls who fall in love with human guys, and both girls are involved someway with a Galatic government. 

Both have aliens as main characters that seem , at first glance, normal. I also notice that they have a lot of panty shots (no yuri) an when refering to alien names they use the high pitch fast voice ... I'm burnt out! 

How can we live together peacefully with aliens while we don't really know their true intentions? How to tell an alien from an earthling? How to influence each other? Let us watch both of these anime and see for ourselves. 

Both male protagonist meet a beautiful girl and became his girlfriend. the difference between these two anime is that the girl in the world of narue is an alien while the girl in nazo no kanojo x is a mysterious girl. 

A boy from Earth and his girlfriend from outer space. Sounds familiar? Although "Narue no Sekai" isn't exactly an early 2000s direct reinterpretation of Urusei Yatsura, but it takes some liberties to expand the same concept and the result is kinda... heart-warming! 

Both are slice of life anime mix up with a fantastic element to it, Ultra Maniac has witches and magic, while Narue has aliens and Sci-Fi, they're both light hearted anime easy to watch with comedy and romance themes also present and towards the end they have a those kinda moments that turns the thing more serious. Coincidentally they aired the same season of 2003 so they have similar production values from that time. 

Both shows feature on a somewhat meek male lead who falls for a not-so-human girl, which leads to even more unusual foolery starting to surround him. While both have some light fanservice, Jitsu wa has some more deliberately raunchy humor and is based around the dynamic between the Asahi and Yoko (including how they seem to keep dodging ending up together), while NnS is a coming of age story that focuses on Narue and Kazuto going through their first relationship together 

Both are romcoms following late middle school relationships with a little bit of a supernatural twist tossed into the coming of age premise. Both also have some out of place usage of fanservice that doesn't quite fit with how generally tame both shows are.  

Both anime is about sci-fi with romance and comedy Both female protagonist are self proclaimed aliens Both male protagonist are taking care of a girl. 

In both series, the main male protagonist meets a strange girl who seems to not be from Earth. From there on, they have a strange relationship that turns from friends to romance. Both series has science fiction themes although Narue no Sekai has a more lighthearted mood. They both also take place in a school life setting filled with comedy and drama. Both series' main male protagonist also has similar personalities. 

The World of Narue and Seto no Hanayome both focus on the romantic yet quirky relationships between a spineless teenage boy and his supernatural girlfriend (in Hanayome, it's the main character's wife, but you get the idea). Both female leads appear to be the ones "leading" the relationship while the leading males constantly watch their backs for any aliens or yakuza mermen tracking them down. The supernatural elements of both shows seem like afterthoughts put in to make the shows more interesting, but if you like the combination of high school romance and fantasy/supernatural action but want something a little funnier, give Seto no Hanayome a try. read more 

Both have alien girls with normal slightly geeky high school earth boys. Birdy the mighty is a bit more "serious and dark" but still comical at times 

Both "The World of Narue" and "Shingu: Secret of the Stellar Wars" are upbeat, postive sci-fi/slice of life anime series. Both are very happy series, light hearted, slow paced, and upbeat, and dignified. Both series deal with aliens who look like normal human beings, and have serious stories, but are cute and never dark or grimmy. Neither series are action packed, exiting, or edge-of-your seat rivetting, but they are instead slower paced shows that deal with normal people (school aged kids) in a sci-fi setting. Both series remember that their main characters are kids, unlike many other anime shows. Both shows have fight scenes and a little action, but they are mostly slice of life, dramas that are very calm.Both "Narue" and "Shingu" were dubbed in NYC, and use a few of the same actors. Both series have similar coloring and shading in their animation/artwork as well (lots of blues, greens, and greys). There are a few differences. For example "Shingu" is set in the distant future, while "Narue" is either present time, or very close to it. "Narue" is also a love story, with lots of romance, which is not the main focus of "Shingu". "Shingu" also has some mecha elements in the back-drop, which are not present int "Narue".  read more 

The female characters are aliens who come from space and end up falling in love in Earth. Ano Natsu de Matteru is more of a drama but also has the nice romantic comedy touch making it enjoyable for those who like Narue no Sekai 

Narue no Sekai and Brighter than a Dawning Blue both have a female character that aren't exactly from Earth and are very close to the main character. There is also an external conflict that tries to separate the two. Brighter than a Dawning Blue takes itself a bit more serious than Narue no Sekai which is more light hearted. 

In both series, the lead male and female characters became boyfriend and girlfriend easily and grew their relationships over the episodes. They also had to overcome obstacles. Narue no Sekai contains more love stories of other people other than the lead characters and features aliens. 

Both male protagonist meet an alien girl. the difference between these two anime is that the girl in dears she became his masters while in the world of narue she became his girlfriend.