Junpei Kousaka is an Ordinary High-School Student with an allergy towards cats and a family that loves the little beasties. Life is normal and fairly peaceful for him, right up until the part where he breaks a shrine that housed the Guardian Deity of Cats.Suddenly, he finds that he can hear cats talk and they can hear him. If he wants to make up for his accident, he must do 100 good deeds for cats, lest he be turned into one himself and possibly die from the full-body allergic reaction.An anime adaptation of the series aired in the fall of 2009, with the second season announced at the very end of the last episode, but never heard of ever since. Nyan Koi! is licensed by Sentai Filmworks and shown on the Anime Network with subtitles. It will be getting a bilingual rerelease in December 2013.
A-Cup Angst: After seeing the little "accident" Junpei had with Kaede, Kotone pats her chest.
Nagi frets about her small chest size.
Adaptation Expansion: To some extent. The manga is still quite young, and the anime is able to shoot through two chapters with one episode. Perhaps as a way to avoid Overtaking The Manga, some new storyline material has surfaced as early as episode 7 that wasn't part of the manga.
Ambiguously Gay: Junpei's friend Haruhiko, at least in his mannerisms. He's been known to buy eroge manga and was the one to start peeping on the girls during the Furo Scene mentioned below. However, he was all-too-willing to wear the maid outfit during the school festival...
And Call Him George: Kaede with cats in the first episode. She doesn't actually kill them, but her habit of luring them with food to hug and cuddle them freaks out the local cats. The first favor Junpei has to do for cats is to get her to stop.
Brick Joke: When Ichinose Nagi first challenges Kousaka Junpei to a duel, she temporarily ducks and cowers when lightning, representing her passion, flashes in her own Imagine Spot. This seems to be completely played for laughs until, later in the same episode, a plot point reveals - in the same overblown humor - that Nagi has a crippling fear of lightning.
Also used for the note itself. When Kotone gives him her confession, he immediately thinks it's another challenge, and is surprised when it's actually a confession. When he shows up though, it's Akari who's waiting for him, and she does challenge him.
Subverted since the cats are grateful for the favors he does for them (not that he has a choice in the matter due to his curse). Only a subversion since the cats have no problems with demanding those favors.
Cat Smile: This is especially the default happy face of Junpei's sister.
Clingy Jealous Girl: Kotone is very clingy when it comes to Junpei and has to be constantly dragged off by Akari. She does show jealousy when she perceives Akari as getting too close to Junpei in episode 10, but she doesn't really act on that.
Further proven when she gets upset when Nagi gets a little too touchy with Junpei in her drunken state, but again she does not act on that.
However, somewhat subverted by the fact that in the manga, she willingly steps aside to allow Junpei and Kaede to have some time together, noting that it was Akari who forced Junpei to go on a date with her.
While they tend to argue about it, Kanako doesn't like seeing Junpei with other girls.
Cloudcuckoolander: Kaede. She is unable to read the atmosphere at times and appears to go into another world entirely especially when it concerns cats and anything that has to do with her vision of manliness (having a Yakuza-style house for example).
Not only that, but she has not realised that she's got a crush on Junpei either.
It seems she might have a clue towards the end of the anime. Whether that'll hold into the next season..
Different as Night and Day: Kotone and Akari Kirishima. Kotone is in love with Junpei (though only because she can't resist someone with that much misfortune) and Akari is against her sister being with anybody.
Dirty Old Man: Chizuru has been described as such by Junpei on a few occasions.
The monk plays this straight, and often dresses up to pick up women.
Eye Take: In one episode, the cats that usually hang around Junpei kept on lecturing him, while at the same time, Kaede was having a cute conversation where she was trying to convey her feelings towards him while she was walking her dogs. Junpei was trying to listen to her, but the cats were talking so loud that he eventually couldn't take it anymore and shouted out for them to shut up. Everyone was so shocked by this sudden outburst that even Kaede's dogs had a clear "O_O" look on all of their faces.
Fan-Art: Most shows with special end cards have them designed by published artists, but Nyan Koi! is letting the fans be the ones to make the show's end cards, resulting in a Contest Winner Cameo for whoever is chosen.
Genki Girl: Kaede Mizuno. She's a member of the Track and Field Club, so all that energy is being put to good use.
Chizuru falls into this trope from time to time, usually if Junpei is around her.
Genre Savvy: Harukhiko constantly jokes about Junpei being in a Visual Novel, and talking about events and flags regarding the main girls.
Gratuitous English: Played with at one point. Nagi calls Junpei and Kaede lovers, but she says it in English. Junpei stops and wonders why she said it in English rather than Japanese (meanwhile, the subtitles have fun with it).
The evil cat spirit in episode 10 says "shit!" at one point.
"Is this a so-called ROOOVUU RETAAHH!?"
Episode 7 also includes bit of Russian - that owner and cat pair (the cat is actually a real Russian consultant/VA Jenya), and apparently a comment about Japanese meditation in a later scene.
Junpei says "I'm okay" after getting slapped awake by Kaede in episode 3.
At the very end of episode 6, while talking to the Kirishima twins, Nagi spouts some rather interesting words:
Nagi: "Oh my God! Pineapple!"
Hair Antennae: Kotone and Akari both have it. It is also one of the few ways to tell the twins apart; Kotone only has one, while Akari has two.
Ham-to-Ham Combat: Usually Junpei and Kanako, but occasionally the cats will do this to each other as well.
Idiot Hair: Indicative of her naturally air-headed personality, Kaede has it.
If It's You, It's Okay: Being the pervert that she is, Kotone often quietly admits in front of Junpei that she would gladly welcome anything he'd do to her if he wanted. Junpei usually either doesn't hear what she said, is to focused on more important issues at hand, or just doesn't know how to respond to her statements.
Imagine Spot: Several characters do this throughout the series.
Kanako shifts back and forth between this and being the rival to Kaede in a Love Triangle with Junpei. One instance she'll deny having any feelings for him, then in the next she goes into Clingy Jealous Girl mode when she sees him hanging out with Kaede. Which only further serves to confuse Kaede if they're dating or not.
Karmic Transformation: Junpei will turn into a cat if he doesn't help at least 100 cats within a certain period of time. And if anyone finds out about his curse, it'll speed up his transformation.
Lampshade Hanging: During the Public Pool Episode both Junpei and Kaede thought they were going to the library to study, yet turn up in swimsuits in the next scene. Tama helpfully pops up and explains that they rented them.
Large Ham: Several characters, but usually Junpei or Nagi.
Limited Wardrobe: Nagi always wears the pants to her track suit. Even while wearing her school uniform's skirt.
Love Hurts: Kaede develops a sad look on her face in one episode after seeing Kanako yank Junpei away for some cleaning duties. It doesn't get lost on Nagi, who gets extremely upset that he made her feel this way, and sends a letter of challenge to him.
Love Letter Lunacy: What appears to be a love letter turns out to be a letter of challenge from Nagi. Which Junpei promptly ignores.
Later, Junpei receives one from Kotone, which Akari promptly grabs from him.
Meet Cute: Junpei and Kaede's first meeting involves her trying to rescue a cat from a tree and using Junpei as a landing pad.
And then she tries to slap him awake...
Love Triangle: Within the main three (Junpei, Kaede, and Kanako), it starts with a type 5, grows into a 4 thanks to Nagi's influence quite early on, and is now at a 7, due to the fantastic events that have begun to unfold in the manga beginning with chapter 25. Love is complicated.
Magic Pants: Averted when, in the anime, Kousaka gets turned into a cat because Kaede is figuring out that he's cursed. Kotone and Akari pick up his clothes after the transformation. When he changes back into a human, he is buck naked.
Ms Fan Service: Pretty much all of the girls could be considered one, but Chizuru fits it the most. In one episode her only appearance is in some naughty underwear while spouting some random mailing stuff that doesn't add anything to the plot.
Nice Job Breaking It, Hero: The premise of the show. Junpei accidentally knocks the head off the cat statue, and gets cursed by having to help out cats and hearing their thoughts. And if he doesn't do it fast enough, or someone finds out about it, he turns into a cat himself.
Pastimes Prove Personality: Kaede is seen renting a video...about mafia bosses fighting with each other. Not what Junpei was expecting.
She's also extremely psyched to find out that Nagi is a mob boss heir.
Running Gag: Nagi is afraid of thunder/lightning because her grandfather constantly got hit by it as she was growing up.
Junpei will almost always be in a Not What It Looks Like situation whenever he runs into Kaede while with another girl. Or when he yells at the cats because they're pestering him while he's trying to talk to her.
Schoolgirl Lesbians: Episode 4 Nagi Ichinose, president of the Track and Field Club, challenges Junpei to a duel over Kaede.
Subverted later on, when Nagi challenges Junpei to win Kaede over by the end of the day, or he'll have to get engaged to her.
Also subverted in that very episode when Nagi explains she's not actually gay, but an "appreciator of beauty." So...bi-curious?
Both Kaede and Kanako were Meido for their class Maid Cafe. Junpei was bowled over by Kaede's look, while the whole class was amazed with Kanako, especially since everyone was seeing her for the first time without Manba hair and makeup.
Secret Keeper: Junpei promises not to tell anyone about Nagi's fear of lightning, and also says he'll be there if she needs him. Which causes Nagi to start developing a crush on him...
Junpei is forced to do this with himself, as revealing the curse to anyone else not only speeds up his own curse, but also affects that person. The Kirishima twins are exempt since they have magical charms/amulets that protect against it. To everyone else, Junpei just looks weird spending a lot of time with cats, considering he's allergic to them. The twins sometimes utilize this aspect of it to get him to do things.
Sequel Hook: The end of episode 12 plainly says that there will be a Season 2, but nothing seems to be forthcoming so far...
She Is Not My Girlfriend: Junpei is constantly accused or teased about dating someone when he really isn't, particularly Kanako or the Kirishima twins. He'd like to avert it with Kaede, but for whatever reason can't spit it out.
Shipper on Deck: Nyamsus of all characters shows signs of being a Junpei/Kanako supporter. Junpei's family on the other hand seems to ship him with the Kirishima twins while Nagi prefers Junpei/Mizuno.
Spoiler Opening: While it's definitely not hard to tell that Nagi is a woman, her appearance in the opening as a catgirl (along with the rest of Junpei's love interests) three episodes before she even appears in-series makes one wonder why it was treated as a surprise at all.
Stalker with a Crush: Kotone, who stalks Junpei and keeping a fantasy diary which involves her and Junpei.
In episode 8, she goes as far as bugging Junpei's house, and even contemplates installing a hidden camera in there just to spy on him. Stalking taken to new levels.
Standard Snippet: The "here are our sponsors" jingle is "Flea Waltz". In Japan, the title is "I've stepped on a cat" (titles from some other countries also have something to do with cats).
Funnily enough, in Russia it's knows as "Doggy Waltz"
Souvenir Land: Tokiwadai Land, complete with some sort of cat creature that looks to be the park's Mickey Mouse.
Stealth Hi/Bye: Nagi instantly appears in episode 5 after her name is mentioned by Kanako while they're having lunch in the classroom.
Nagi does it again in episode 8.
Suspiciously Specific Denial: In episode 6, Kanako claims she's not interested in hearing Junpei's friends gossiping about him going after a twin-tailed girl, but she insists they tell her anyway. Nagi uses a similar threat.
Thanks for the Mammary: Nagi does this to Kanako in episode 4. Hilariously, she squeezes it again after about a 2 second delay from the first one, before Kanako finally uppercuts her.
Junpei finds out Nagi is a girl this way as well later in the same episode.
Theme Tune Cameo: Junpei is shown hearing the OP song on his headphones as he's walking, early on in Episode 1.
Those Two Guys: Haruhiko and Kouta, Junpei's two guy friends who are seen occasionally in his class.
Transsexual: Chizuru's love interest, to her surprise, is now a woman.
Tsundere: Akari's attitude towards Junpei fits, as does Kanako's. Both are Type A Tsunderes.
Twice Shy: Both Junpei and Kaede like each other, but neither one seems willing to make the first move. Other girls expressing interest in him also serves to confuse Kaede as to whether he's dating them, or may not really be interested in her.
Yandere: Kotone. She sends an e-mail warning Junpei not to go further than holding hands with Kaede, or something might happen to his body. Then again, she's nice enough to let him continue his date with Kaede after understanding the "situation".
Zettai Ryouiki: Both the Kirishima twins. Akari's a Grade S while Kotone's a Grade A.