After a blinding light emanates from her phone, soft-spoken Yuzuki is suddenly transported to an alternate world known as Shinga. The strange place resembles the Sengoku period—a turbulent time in Japanese history known for long civil wars that ravaged the country. Here, the Gekkazoku, tribes of non-human creatures like vampires and werewolves, live in harmony with humans. This harmony was maintained under the governance of Himemiko, a woman with the power to protect Shinga. However, due to her mysterious disappearance, the world has fallen into disarray. Now, Yuzuki must find Himemiko in order to go back home; but, the ongoing feud between the warlords only impedes her progress.

Eustachius no Shitamachi Sennyuu Dai Sakusen (Eustachius' Incognito Operation Downtown) To get more information about Myne and her strange background, Head Priest Ferdinand sends two nobles, Eustachius and Eckhard, to investigate everything regarding her life within her hometown. However, things do not go the way they expected. Corinna-sama no Otaku Houmon (Visiting Missus Corinna) Otto's wife, Corinna, takes an interest in the outfit that Myne wore at her baptism. Corinna summons her alongside her mother, Eva, and sister, Turi, wishing to know the procedure in making such sophisticated attire and accessories. Naturally, for Myne, she sees an excellent opportunity for profit.

The Taishou era didn't end in 15 years, but went on for another 25. In order to protect her waning family, a girl resolves to marry a man she doesn't even know the name of. However, just before the marriage was to take place, the girl's younger brother mysteriously committed suicide by self-immolation and was found holding an old book in his hands. Appearing before the bewildered young girl was the Imperial Library Intelligence Asset Management Bureau, more commonly referred to as Fukurou. According to these men, there exists Maremono, which are books that greatly affect their readers. On top of that, ever since the incident involving the girl's younger brother, she unwittingly gains the ability to see Auras (the sentiments of the Maremono which manifest as bright lights and are usually invisible to humans). It was as though fate were trying to drag the young girl in its flames. And then, even though apprehensive, the girl chooses to venture outside her bird cage. Jealousy, hatred, scorn, compassion, and love. What awaited the girl was the darkness of betrayal that had already begun to bewitchingly inlay the imperial capital. Toyed by and swayed within that darkness, will the young girl finally reach the truth after her struggles, or...? (Source: MAL News)

If you're in a big trouble, call the World Welfare Work Association or WWWA. They will send out a team of highly trained capable agents called Trouble Consultants who can solve your problems. But if the team they send you is the Dirty Pair, there will be a lot of collateral damage aside from solving your problems. (Source: AniDB)