Long ago, Inazuma had five legendary poets, people bestowed upon them the title of The Five Kasen
One year, the poet Suikou made his way to Tenshukaku, and presented the Kasen's work for the Shogun's perusal, but a page from the works of Aoi no Okina had been torn out, and Suikou was questioned regarding the matter, suikou pleaded guilty, he admitted to drinking at the tavern the night before, and vaguely recalled a mysterious figure approaching while he was intoxicated
That figure was none other than Aoi no Okina himself, this turn of events had begun with an unnamed individual, under whose coercion Aoi no Okina was forced to take drastic measures to retrieve a page of poetry, he knew nothing of this individual's true intentions, all he knew was that the poem had to do with an old acquaintance, Akahito.
Akahito had once belonged to the Five Kasen, each poem he composed, he marked with a scarlet red seal, hence the "Aka" in his name, such a distinguished writer was he, and yet one of the poems he had submitted the previous year, was found to be plagiarized, Akahito was exiled for his crimes, and only four of the Five Kasen remained.
Sumizome went over Akahito's poems, and noticed that the plagiarized poem lacked his seal, she immersed his poetry in a stream nearby, and only on the plagiarized poem, did the ink run, aoi no Okina passed by, and witnessed Sumizome's doing, which he then recorded in a poem.
Thus, transpired the events of Suikou's poetry submission, and this is where the story comes to an end