Keen to discover the true identity of the man in the kitsune mask, Adashino visits Kasumi, the master of ghost stories! But across town, caution signs fill the streets as mysteries run amok, and worse, kindershifter Sumireko finds herself trapped in child form! Oto becomes her caregiver and treats Sumireko like a dress-up doll, while Uname-sensei and Shizuku have cosplay ideas of their own! The city has a secret nobody knows--but what's the dress code for the formal occasion of a supernatu...

Mysteries aren't just secrets, they're objects! There is the Elixir of the Moon, which restores one's youth! The Songs of Another World, which must never be uttered aloud. The Curious Report of the Enchanted Land, which contains the testimonies of those who have been spirited away! And now, in Tokyo, these mysteries and more are reappearing in the form of urban legends. Burnt-out novelist Ogawa Sumireko and demon boy Adashino Ren are out to collect as many as possible, but Sumireko has a k...

Adashino, gravely injured beyond even the power of his demonic vitality by the Queen of Cats, is cured...by his very first kiss from former novelist Sumireko! The pair further bond when they must save their bookstore coworkers from the latest mystery, but is that supernatural encounter just a distraction from the machinations of the fox-faced boy stalking Adashino? And speaking of distractions--the gang puts on their skimpiest bathing suits and heads to the beach! Will being hot-to-trot ge...

Strange new mysteries have made their way into the all-girl school demon-girl Adashino Oto attends, and Sumireko is on the case! The mystery that "licks one's shadow" is odd enough, but who could possibly solve the riddle of the Pearl of the Cow, or face that totem of lost souls known as the Jinrinki?! Not to mention the watchman of the spirit world, "Uncle Time." It's up to hottie novelist Ogawa Sumireko to take on all these urban legends, with the help of baby-faced demon boy Adashino Re...

A few days after the Hime-uo Vtuber incident the King of Cats finally makes his appearance! Faced with the entity behind all the supernatural occurrences in the region, the Adashino siblings find themselves in an unprecedented crisis, and it is up to Shizuku to come to the rescue! She forms a new duo with Sumireko, and together they must discover the occult truth of the King of Cats before it's too late!

Kuzunoha follows a mysterious train and finds herself trapped in the Otherworld Station. Ren and Sumireko chase after her, but if they make even one wrong choice, they'll have their own tickets punched, permanently! And who else might one meet on supernatural mass transit? How about the enigmatic Kasumi, who knows much about the Adashino family's past...and perhaps even a certain member of feline royalty?!

There's a new urban legend in town--the one they call the "Girl in Crimson"... After burnt-out novelist Shizuku's best friend Tomoko disappears, she takes off into every rainy night in search of her, only to find something else! And then the true identity of the Adashino siblings is finally revealed--the shocking truth is not for the faint of heart or those unschooled in the occult! Are you ready?

After the mystery of the Queen of Cats is resolved and tearful good-byes exchanged, it's time to cheer up! Former novelist and current hot-to-trot slacker Ogawa Sumireko gets dressed up in a yukata and takes her otherworldly allies Adashino Ren and Oto to see a fireworks display. But mysteries are always brewing on summer nights, and who knows who, or what, the trio will encounter in the dark between flashes of light!

A Tsukumogami is an inanimate object that gains life after one hundred years of service to its master--but the accelerationist digital age means that modern devices are gaining souls right now! What can a burnt-out novelist and some devilish siblings do about it?! Especially when they also must face some classic mysteries, including the Princess of Books, and that infamous harbinger of truth, the black cat!

An overworked salaryman and a mischievous cashier with a dual personality form an unexpected bond in this sweet-and-sour comedy!The new year starts strong for Sasaki when the beleaguered salaryman forgets his own birthday. But his days turn around when he meets Daigoro's owner and discovers a new side of Tayama. Sasaki begins to realize the importance of the bond he shares with Tayama, even through her lighthearted teasing. This part of his life has become a collec...

An overworked salaryman and a mischievous cashier form an unexpected bond when they light up together!After the stress of a medical misdiagnosis, Sasaki resumes his strange yet calming nighttime smokes with Tayama. Yet he's still unaware that Tayama and Yamada, his therapeutic idol, are the same woman! Sasaki and Yamada are merely customer and cashier inside the store, but as more quirky supermarket employees enter the mix, will Sasaki's relationship with Tayama be...

Kouji Mikagami is a normal high schooler who loves playing games. But one evening, he finds himself summoned to another world full of extraordinary magic and voluptuous women! To top it all off, he’s received a unique skill as a blessing from the Goddess—Copy! Surely that’s top-tier, right…? So why is Mikagami fighting as a gladiator-slave in a coliseum where the losers are ruthlessly bred at the winners’ mercy?!