In an alternate feudal Japan (specifically set in an alternate Edo era), breasts mean everything. Literally.In this strange time, the social status of a woman is entirely dependent on the size of her mammaries. The more favorably endowed tend to live the life of aristocracy and wealth. The less-than-ample are treated like trash. Of course, a system such as this would lead to a very erratic society, with wealth shifting hands haphazardly every generation. That's where the Manyu Clan comes in.The Shogunate employ the Manyu Clan, a group of samurai who know the endless intricacies and knowledge of the human breast, to keep the rich and poor in their place. Using knowledge and techniques passed down through the generations, the Manyu Clan nurtures the future aristocracy to reach their buxom potential. They also dispatch of the poor who develop massive, magnificentmounds through the use of their secret slashing technique, which rips the "soul" of the breast out of the target's body. Without harming their supple body, of course.Chifusa, the future successor of the Manyu Clan, becomes disillusioned of the crazy society in which she lives, and flees with the sacred scroll of the clan, which explains all of their breast-growing secrets, as well as the technique to destroy the breast. Chifusa gained her status as successor not because she was the eldest of the aristocracy (although being one of the previous successor's children helps a bit), but because of a technique she and she alone possesses: the ability to not destroy, but absorb breasts. While remarkable, this is mostly a hindrance to Chifusa. Despite this, she goes on a Robin Hood-esque quest to right the wrongs of society and to punish the unjust who flaunt their wealth.
Contains examples of the following tropes:
Above Good and Evil: Considering Good = Boobs in this world, it's not hard to see why Chifusa thinks this way. By conventional standards, though, she really isn't.
Aloof Dark-Haired Girl: At first glance, this is Chifusa, who has dark blue hair. It becomes apparent very quickly that she's a goofy, slightly girly Tomboy Princess who is trying as hard as she can to be aloof.
Author Appeal: Not the author of the manga, but the director of the anime adaption, Hiraku Kaneko. He has a blatant love for oversized breasts. A lot of elements from the manga are exaggerated in the anime. This is par for the course when it comes to his the other adaptations he has worked on, either as a director or an animator (Witch Blade, Queen's Blade, etc).
The anime adaption has added nipple sucking in many episodes, a holdover from Seikon No Qwaser...where there was actually a reason for it.
A-Cup Angst: Kaede, who used to be quite well endowed until her master, Chifusa, defected. The fact that Chifusa has become more than a little bustier does not help. The same applies to Kagefusa, but she gets better...mostly.
And there's Ouka
Art Evolution: Quite noticeable. By volume three the art has become much more streamlined.
Bloodless Carnage: Hitomune's rampage at his traitorous vassal and his men, many were slashed and yet not single drop of blood was spilled.
From the way he held his sword, it appears that the was using the blunt edge. There was plenty of slashing, but little to no stabbing, so the only bleeding going on would be internal.
Break the Haughty: Kagefusa, in the first chapter or episode, as the first victim of Chifusa's ability to absorb breasts; she goes from extremely well endowed to flat or nearly so in seconds, and Chifusa's breasts jump in size to even bigger than Kagefusa had, just to rub salt in the wound.
Deconstruction: The whole show takes the idea that a woman's breast size equals status and authority and shows in unequivocal terms that it's a terrible way to judge a woman's worth as opposed to their actual talents and ability to contribute to their society.
D-Cup Distress: Oiso from is notable for being one of the few large breasted women in the series to hate her breasts. In a fishing village dependent on skilled divers, she was formerly the best, but her breasts grow so large that they got in the way of her diving. When Chifusa ends up having to use the breast-absorbing technique on her, shrinking Oiso's breasts, Oiso is grateful. Kaede looked furious at the idea of hating breasts.
Fanservice: Considering the type of magazine it is published in, as well as the very concept of the work itself, this shouldn't come as a shock. However, as the series has progressed, fanservice has become less and less frequent.
The anime is exactly the opposite. It took the fanservicey nature of the first volume and cranked it Up to Eleven.
Fake Boobs: Kagefusa dons an inflating bra, after Chifusa steals her breasts.
Fanservice with a Smile: More than once Chifusa and Kaede have had to get part time jobs in maid outfits to keep their funds up.
Gag Boobs: It's an action/comedy about breasts. You should have seen this coming.
There's one particularly notable example; after devastating a very large group of buxom ninja, Chifusa finds herself with breasts so big she can't even stand due to their sheer weight. Cue a Rocky-esque montage of her training at a nearby temple to learn how to reduce her size while wearing what is essentially the biggest sports-bra ever.
Gainaxing: Invoked when Chifusa agree to represent a village in a festival where each side nominates their bustiest woman to stand on portable platforms and has attendants shake the platforms under them to get the breasts to bounce.
Weaponized in the second episode where an assassin puts Chifusa in a trance with a technique that involves drugs and spinning her breasts. However, the downside is that the technique causes her breasts to sag.
Hit Me, Dammit!: When Chifusa discovers that Kagefusa has to use fake breasts because she couldn't deal with the lost of her real breasts, which Chifusa stole, Chifusa proposes that Kagefusa shrink her breasts as payment.
I Have Boobs, You Must Obey!: Played with. Boobs are the source of social standing in this world, after all, so it's not all that crazy when a chick can just pull them out and turn a potential fight into a frenzy of cheering and general happiness.
In the Blood: Chifusa's bloodline happens to be that of the enemy of the Manyu clan. The leader decides to make her the heiress due to her incredible potential. It didn't work out.
Incorruptible Pure Pureness: Despite being born and raised in a society where breasts mean everything, being raised as the heir of the clan that basically controls the country, and being taught that women without breasts are trash, Chifusa still sees the good qualities in the flat and the bad qualities in the busty. She doesn't see either side as necessarily better or worse, the system just isn't fair. Although, it could be that her rebel blood is what makes her fight.
Knight of Cerebus: Ouka, who uses her blade to actually kill someone instead of just shrink their breasts.
Lens Flare Censor: The anime's censored broadcast goes crazy with this. Shots of characters holding large flabs of "light", entire bodies glowing, and lasers covering the majority of the screen are not uncommon. Inevitable Dragon Ball jokes followed.
Lovable Sex Maniac: Kaede has an obsession with Chifusa. And large breasts. And just hot chicks in general. Even more so in the anime, where she attempts molest Chifusa at least four times an episode, instead of just once every other chapter.
Super Drowning Skills: Chifusa and Oiso share difficulty in diving. Oiso was the best diver in her village until her breasts developed, making her too buoyant to dive properly. After Chifusa is forced to absorb her size, Oiso's diving skill returns, while Chifusa becomes even more inept.
Title Drop: The Scroll Chifusa carries with her, the Manyu Clan's treasure: Manyu Scroll —> Manyu Hikenchou.
Too Hot for TV: As expected, the initial version has been called a "Broadcast Wreck" due to excessive use of Lens Flare Censor that renders it mostly unwatchable. The AT-X broadcasts, meanwhile, are partially uncensored, and the fully uncensored Director's Cut is available as a streamed webcast. DVD and Blu-ray versions are (as usual) uncut.
Widget Series: However you may take the shockingly-bizzare concept, you have to praise it for being daring and original.
Work Off the Debt: Chifusa and Kaede seem rather used to having to work at the places they rest and eat. In the beginning of episode 4, when they realize they don't have enough money to pay for the food they just eat they immediately put on their waitress uniforms from a previous episode.
You Have Failed Me: After Kagefusa's squad fails to capture Chifusa, she punishes them by shrinking all of their breasts. Considering how important breasts are in this show it's a hefty loss.