Severely allergic to felines, Yuuto Amakawa spends his mornings nursing a drippy nose courtesy of his friend Rinko's cat. But on his sixteenth birthday, it's not just Rinko's pet that's riling up his allergies (to say nothing of his hormones)! Appearing before him is Himari, a buxom, sword-wielding cat spirit in human guise, who has sworn to protect Yuuto, now the target of vengeful spirits! It's clear that Yuuto's allergies are the least of his problems - he's gonna need Himari's help if he wants to live to see his seventeenth birthday!
Haunted by the untimely deaths of his mother, little sister, and a childhood friend, listless high schooler Haruomi Io has trouble engaging with anything or anyone. Of course, that doesn't mean others have trouble engaging with him-a fact he discovers to his dismay when he finds himself the target of a trigger-happy group calling themselves the "Seventh Gospel Organization." Having newfound enemies may be rough, but Haruomi's unexpected ally in the form of a demoness calling herself Zilch may turn out to be even more of a handful...Still, there's something to be said for a dose of the supernatural (and more than a few buxom girls) when it comes to casting off the doldrums!
Yuuto, having accepted his duty as a demon slayer, is welcomed to a slayer roundtable at the home of the first-rank family, the Tsuchimikado. However, the demon slayers gathered there aren't as welcoming to Himari. Claiming that Himari will prove to be a danger to Yuuto, they go on the offensive to draw out the bloodthirsty, evil beast that dwells within her soul. But they're in for a surprise when...!?
Trapped in a pint-size body thanks to the machinations of Kuesu Jinguuji, the dejected Himari is stuck in a rut as she tries to come to grips with her new, weaker form. But she doesn't have long to mope, as her former ayakashi opponent, the hinoenma Ageha, steals Yuuto away to have her way with him! With Shizuku's help, the buxom cat-spirit guardian of the Amakawa demon-slayer family awakens to her calling and rushes to the side of her lord! But while Yuuto has Himari to protect him, who will protect Himari and their other spirit friends when two powerful demons enter the fray in search of ayakashi blood?!
With Yuuto's slayer powers having temporarily awakened in an attempt to save Himari from herself in battle, the clumsy young warrior also regains memories from his past...of when he first met Himari! However, those present at the scene of the battle aren't the only ones who've borne witness to Yuuto's awakening. While Yuuto's current spirit acquaintances are just keen on giving him some special intensive "training" to "awaken" him further, not all the parties interested in Yuuto are prepared to play nice! When another demon slayer storms into Yuuto's life claiming she's his fiancée and the girl in his regained memories, not Himari, Himari and Yuuto are thrust into a whirlwind that threatens to tear the two of them apart forever!
Sure, timid Yuuto Amakawa has his hands (and bed?!) full with his new housemate - the beguiling, sword-wielding cat spirit Himari, who has sworn to protect him from spirits out for his slayer blood! But Yuuto's desire to coexist peacefully with the spirits his ancestors once hunted has a not-entirely-unwanted side effect - his life is suddenly chock-full of beautiful girls! He's got a Lolita water spirit now also freeloading at his place, and he keeps finding himself in the middle of random encounters with gorgeous female spirits of all shapes and sizes. Yup, Yuuto's got it made! That is, until a trip to his late grandparents' house turns deadly...
When Himari squares off against Kuesu Jinguuji, demon slayer and purportedly Yuuto's betrothed, the cat may have bitten off more than she can chew! Kuesu's abilities are formidable to say the least, forcing Himari to retreat with her tail tucked between her legs. Is the shame of defeat in battle too much for Himari to bear, or can Yuuto be the one to offer her support for a change?
Forced to stand by and watch as Himari faces off against an onslaught of monsters ordered to attack by Tamamo-no-mae, Yuuto finally accepts his role as a demon slayer! But acceptance doesn't automatically make him good at it, and the young warrior must continue training to become master of his own potential! And during one such training session, Yuuto runs into another sleuth-like slayer, Hitsugi Yakouin! Will Yuuto learn a thing or two about using his own Light Ferry powers with her?
A demon slayer thus far in name only, Yuuto finally decides to take his potential into his own hands to protect his spirit friends from two rampaging demons out for their blood! But after undergoing intensive training with Himari for this purpose, Yuuto is called to battle not the bloodthirsty Tamamo-no-mae and Shuten-Douji, but his Lolita housemate, Shizuku, who has been consumed by her deep-seated grudge against the demon-slayer clan that decimated her family! Will Yuuto have to whip out his new skills against Shizuku, or will he find another way to talk the water snake spirit down from her rage?!
Yuuto Amakawa's ordinary life changed drastically when he encountered a buxom feline spirit named Himari and was initiated into the world of spirits and demon slayers! Sure, life with the supernatural has brought adventure (and danger!) to Yuuto, but it's also considerably ramped up the raunch factor in his world! And this companion volume of Omamori Himari will bring more of the same to both series newcomers and hard-core fans, with a titillating full-color manga installment and anime design gallery and a comprehensive guide to the characters and universe of this New York Times bestselling series!
Kuesu, who has returned to the fold as an immortal, arouses great joy and relief in Yuuto. But at the sight of her beloved Young Lord happy and in the arms of another, Himari succumbs to the dark beast that dwells within her and goes on a rampage. As a demon slayer whose duty it is to stop out-of-control ayakashi like Himari, what decision will Yuuto make?! Find out in the moving conclusion to Omamori Himari!
While Yuuto's away, the Nine-Tails comes to play! Himari and Shizuku are home alone when their foxy enemy drops by out of the blue to hit the pair with a vicious assault that forces them to flee. Meanwhile, Kuesu, having rushed after Yuuto and company, looks to launch the decisive battle with Shuten-Douji all on her own?! All involved will be reeling with passion and loss before this battle ends...
When the Nine-Tails takes a bite out of Yuuto, a livid Himari turns the tables and overwhelms the powerful ayakashi with her great strength. However, the more Himari rages, relying on her demonic power, the more her heart is consumed by darkness. The battle may be over, but has Himari already lost the war . . . against herself?!