Nyan Koi!

The drawing style in some scenes are similar between these series (the funny scenes), also the way they make the jokes. 

Featuring similar Yakuza Songs lol Comedy with Fantasy + School with Harem and a bit of ecchiness as spice Rich in funny characters Running in moderate to fast pace Well SnH's far more vigorous in some episodes  

Both are produced by AIC and have similar art style. The funny scenes are very similar and both are a harem rom-com. I found Seto no Hanayome more funnier than Nyan Koi, but Nyan Koi was a bit more moe than Seto. 

The two of these are basically the exact same, but one has cats, one has mermaids. 

Cats and wish granting. Except In Nyan Koi! The MC has to grant wishes for cats and in Hentai Ouji a cat statue grants wishes for the MC. Also both are Harems. 

Both have themes of cats and curses. Very similar in feel. 

In both anime, the protagonist has to deal with a supernatural limitation placed on him from the cat deity but interacts more with a cute girl (romantic interest) due to that. Comedy plays a big part in both anime but they tend to have different types of humour (but both have focus on situational humour). But, Hentai Ouji has more focus on romance and the main character is more heavily focused on the idea that he's a pervert. Otherwise, Nyan Koi is a good extension for those seeking a romantic comedy with some supernatural cat powers. 

Both are harems...involve unrequited love lots of jealousy a love triangle and the main plot to both stories revolve around cat kamisama and statues. 

At first it felt same as nyan koi! A little ecchi and cats. If you enjoid Nyan koi you will enjoi Mayoi Neko Overrun to. 

Both has large amounts of cats and neko girls eveywhere! 

There are cats in both anime. Mayoi does not have any supernatural elements, but it keeps it quite interesting with a cute cat girl with a Shiina Mashiro, Inori Yuzuriha character build with probably the same VA as well (￣▽￣) (Warning: Main character is annoyingly indecisive in both anime's. Raging is ensued) 

Nyan Koi! is about kousaka Junpei who is a 2 second year high shcool student who is allergic to cats. one day on his way home he accidentaly breaks the head of the cat jizou( a monument ) and get cursed and thus can talk to cats and understand them. to get rid if the curse he now has to help 100 cats. and funny stuff happens along. Omamori is about a high school studen to who also is allergic to cats. though the history is a bit different since its a cat eared/tailed woman who shows up and swore to protect him. 

The main character of both animes are allergic to cats. unfortunately they both have to be around girls with cats. 

Both are romantic harem comedies about a main character that attaract girls whithou even trying. Both characters have allergy to cats. 

In both, the main character has some sort of unusual disease (alergy to cats that grows to extreme measure/alergy to girls). In way tu cure his dissease, he meets girls that falls in love with him. Both are romantic comedies. 

Two harem rom-coms in which the male protagonist, through a fateful encounter surrounded by peculiar circumstances, embarks on a journey of sorts in which he comes to notice the various girls with quirky personalities around him. Additionally, he is slapped with a certain odd disability that is a double-edged sword; while working through it creates wonderful opportunities with said girls, it also manages to get in the way of things. But that's not all. Sharing the same director, it comes as no surprise that the shows' style of approach towards the genre has a similar feel to them. The plot in each series takes full advantage of the possibilities presented by MC's "disease" - expect hilarious setups, over-the-top reactions and zany situations with plenty of slapstick - the focus on their familiar brand of light-hearted comedy to drive the interactions between characters is the name of the game here. The romance isn't unfulfilling either; the shows' ability to insert heartfelt moments throughout the course of the episodes, as the protagonist's relationships with the cast of his harem are explored, don't go unnoticed. Nyan Koi! is filled with tons of cat-themed mischief, while Mayo Chiki! has that touch of ecchi flavour. Why not give the other a try? After all, with one of my all-time favourite seiyuu, the ultra-talented, super cute-sounding Yuka Iguchi at the helm in both anime, what more could you ask for? read more 

Both Harem/Neko theme. Asobi ni iku yo! focuses on the action scenes, Nyan Koi is more about comedy and slice of life; however, both are a must-watch for cat/harem lovers. 

I decided to compare Asobi ni Iku yo! to Nyan Koi! solely because they both involve cats. Well technically Asobi involves alien-cat girls, while Nyan Koi! simply involves cats and some dude that can talk to them. However, they both are romance-comedies, ecchi, and harem anime's.  

In both, main character can talk to cats and is somehow "cursed" to be changed into one if he/she won´t do something against it. The Cat Returns is more adventure while Nyan Koi is more comedy. 

A guy who can't work up the courage to say 4 words to the gal he likes winds up having some sort of thing happen to him in the first episode where some wacky hijinks ensue for the rest of the show. 

Both stories are about a guy who likes a girl in their school and for some reason or another gain some mysterious power which they dont want, to transform in a girl for kampfer and talking to cats in Nyan Koi! Throughout the story both also share similar circumstances where girls around him begin to fall for him. Both animes are also fairly new. Both also have some fanservice at times but not too much to spoil the anime. Though the girls in Kampfer are much more aggressive than those in Nyan Koi!  

Stories about a guy, with some kind of bad luck, surrounded by many girls