Yukinari Sasaki fears girls, having been teased and bullied by them to the point that he breaks in hives upon mere contact with them. One day, having come home from school, his Tsundere neighbor Kirie Kojima kicks him into his bathtub and is transported to "Seiren", a mysterious world with a mostly female population. Much hilarity follows.
Girls Bravo examples of:
Abuse Is Okay When It Is Female on Male: Kirie constantly brutally beats up Yukinari (In Episode 1 she knees him in the face, and he bleeds profusely) and it's (supposed to be) Played for Laughs. If the genders were reversed, this would not be seen as funny.
She also regularly abuses Fukuyama which at first seems reasonable because he is a giant pervert but she later meets even more perverted psycho lesbians that she prefers to run away from instead of fight unless they hurt either Fukuyama or Yukinari.
Berserk Button: Kirie is apparently a really nice person unless one of two things happen: 1) somebody hurts one of the boys she likes; and 2) seeing said boy in question.
Big Brother Complex: Tomoka and Fukuyama develop this sort of relationship and she by the end she is the only character to refer to him by his given name Kazuharu.
Boobs of Steel: the obvious answer at first would be Kirie but by the end of the series over half the female cast prove that they're no slouch in this department either
Butt Monkey: Yukinari, and Fukuyama are constantly beat up and abused by Kirie and to a lesser extent the other girls beside Miharu, and they both have allergic reactions to members of a certain genderand
Kirie herself sometimes becomes one when she is around a Psycho Lesbian
Casanova Wannabe: Kazuharu Fukuyama. He has a habit of feeling up women whenever he so much as talks to them, and he has the resources to have a mansion with such features as central air in the flooring to blow up skirts, and an elevator that takes women's measurements.
Chekhov's Gun: Remember Yukinari's being dressed as a girl early on? Not only does he accidentally knock the big bad down, his costume even down to the hair color and fake name he uses is foreshadowing her.
Other contenders for this title are Fukuyama and Kirie, who does not get tortured enough to qualify (even though considering her actions she is most enjoyable to watch squirm).
Chick Magnet: Yukinari. By the end of the series he has four girls after him.
Chivalrous Pervert: Fukuyama not that Kirie cares about the chivalrous part.
Clingy Jealous Girl: Lisa and Yukina over Yukinari. Kirie and Miharu are more subtle about their affections towards Yukinari.
Kirie also acts this way to Fukuyama, even attacking him one time after some of his female admirers rescued him from drowning.
Character Development: By the time the second season rolls around Kirie becomes considerable more nicer to Yukinari and actually uses her fist on Fukuyama, someone who really deserves a beating.
Fanservice: And how. The first piece of it is shown within the first 10 seconds of the first episode.
Hell, the opening of the second season of the anime is a nude roll call of the female cast.
Friendly Enemy: the Fukuyama siblings to the rest of the cast, how many other shows are there where the main antagonists are also Drop-In Character. Of course sometimes they get a little too friendly.
Gender Bender: In one episode Lisa uses her magic to switch various people's bodies, although the body-switching gets out of hand (she didn't actually intend for gender-bending to occur).
Gendercide: despite the fact that Seiren is already 9/10th female Yukina wants to kill all the remaining men to turn it into, in her words, a "women's only paradise."
Get A Hold Of Yourself Man: Subverted as both Kirie and Fukuyama attempt this on Yukinari after Miharu is kidnapped only to discover that when you have spent years beating up a man for fun, slapping him when he is severely depressed and crying will not do much. He is eventually snapped out of it by a speech on Manly Tears by The Boss.
Hypocrite: In the first episode, Kirie once again prepares to pound Yukinari for walking in on her while she was in the shower. Yukinari points out that since he's so afraid of women, he has no reason to want to peep on her. Kirei then turns this around and accuses him of not liking her body, which only make her want to beat him up even MORE.
Adding to the surrealism of this scene is the fact that this... um, character? says all of its lines in English, even in the original Japanese version.
Intergenerational Friendship: Tomoka the youngest cast member, who clams to be the most mature person on the show, and Lisa's henchman Hayate who actually is the most mature strike up a strange friendship.
Karma Houdini: Kirie. She never gets called out on her behavior towards Yukinari, and nobody ever stops her when she's beating him up.
However, she does get a few humiliation moments here and there, getting close to Butt Monkey status when Kosame is around.
Lord Error Prone: Mamoru Machida, wanna-be superhero and self-proclaimed savior of the neighborhood; since he's oblivious to what's really going on, he's easily the most destructive of the minor characters.
Never Live It Down: Kirie, most people tend to overlook the fact that she outgrows her abusive tendencies by the second season, behaves more like an actual friend to Yukinari and even has a heartwarming moment with Yukinari near the end of the series.
Ninja Maid: Fukuyama has some at home, most notably one that was a former mercenary which he states is a trained killer (Lilica), and he doesn't appear to be exaggerating.
Nosebleed: at times also the result of getting punched (and kneed) so hard in the face
One episode used this to show that the guys were excited about what the girls were doing...
Pre-Mortem One-Liner: Nonlethal variant; Kirie almost always yells "(Verb) IN HELL!!!" before unleashing a Megaton Punch on Fukuyama or (occasionally) Yukinari. Tomoka also starts doing this as well (much to Kirie's approval).
Stalker with a Crush: Lots. Lisa for Yukinari; Fukuyama for any pretty girl but mostly goes after Kirie or Koyomi; Kosame for Kirie, Hijiri was obsessed with Miharu since they were children but later switches over to Kirie, and by the end of the series Yukina for Yukinari.
"You've always been a midget, a klutz and a blockhead. Not to mention slow in the head and snow on the uptake... I mean, I knew you were a hopelessly lame and worthless shell of a man, but to peep at me just because you can't get a girl..."
The Stoic: Hayate (except when someone asks him to marry him), Kosame (when she isn't around Kirie), and Lilica (unless told that Fukuyama has friends).
Too Kinky to Torture: Lisa, Kosame, and Fukuyama — unfortunately for Yukinari, Kirie, and Koyomi.
Fukuyama has actually been bothered by pain on three accessions, one, Kirie tied him out left him in an oil drum full of boiling water, two, he was hit by truck, and three, when Maharu K Oed him with a kick to the face.
Tsundere: Kirie, for instance she shows concern for Yukinari and gives him her handkerchief to help him clean up after he was badly beaten, however she was the one who beat him because she walked in on Miharu changing in the living room.
It is also heavily implied that she secretly likes Fukuyama.
The first episode pretty much served as the best example. Yukinari accidentally walks in on Kirie in the bathroom when she's naked which results in her kneeing him in the face. He then goes through the process on how it was an accident and how, because of his symptom, wouldn't even want to see her naked. She attacks him regardless for not wanting to see her naked.
The worst part? It's his own FREAKING BATHROOM. IN HIS OWN HOUSE. WHICH SHE DID NOT ASK TO USE.
Unwanted Harem: Three girls have feelings for Yukinari, one is a bully who has beaten him up almost every day for years, another is an insane YandereDark Magical Girl who tries to abduct and rape him, the final one is a kind and sweet girl who does not set off his woman allergy, guess which one he returns his feelings for.