Read manga: Touhou Suzunaan - Forbidden Scrollery.

manga
Summary:

Marisa Kirisame runs into Hieda no Akyuu on her way through the Human Village, and notices that she's carrying a strange book - a youma book, said to be indecipherable. Afterwards she makes her way to the Hakurei Shrine to ask Reimu Hakurei about them, but she doesn't know much on the subject. Marisa explains their dark and mysterious nature, and the two decide to take a visit to Suzunaan to talk to Kosuzu Motoori about it. She reveals her collection of demon books, as well as her recently-awakened powers that allow her to decipher any sort of script. Reimu worries that it might be dangerous, but Kosuzu is not very concerned.

Chapters (55)
Aug 25, 2019
Chapter 53
Aug 25, 2019
Chapter 52 : Yukari Yakumo S Peace
Aug 25, 2019
Vol.7 Chapter 51 : Reimu Hakurei S Miscalculation (Part 2)
Aug 25, 2019
Vol.7 Chapter 50 : Reimu Hakurei S Miscalculation (Part 1)
Aug 25, 2019
Vol.7 Chapter 49 : Kosuzu Motoori S Conflict (Part 2)
Aug 25, 2019
Vol.7 Chapter 48 : Kosuzu Motoori S Conflict
Aug 25, 2019
Vol.7 Chapter 47 : Hieda No Akyu S Philosophy (Part 2)
Aug 25, 2019
Vol.7 Chapter 46 : Hieda No Akyu S Philosophy (Part 1)
Aug 25, 2019
Vol.6 Chapter 45 V2 : Let S Not Go Out On Purple Days (Part 2)
Aug 25, 2019
Vol.6 Chapter 45 : Let S Not Go Out On Purple Days (Part 1)
Aug 25, 2019
Vol.6 Chapter 44 : Let S Not Go Out On Purple Days (Part 1)
Aug 25, 2019
Chapter 43 : One Hundred Ghost Stories For Humans And Youkai (Part 2)
Aug 25, 2019
Chapter 42 : One Hundred Ghost Stories For Humans And Youkai (Part 1)
Aug 25, 2019
Vol.6 Chapter 41 : Is This All The Work Of Youkai Too? (Part 2)
Aug 25, 2019
Vol.6 Chapter 40 : Is This All The Work Of Youkai Too? (Part 1)
Aug 25, 2019
Vol.6 Chapter 39 : Are The Lords Of Information Gathered? Or Scattered? (Part 2)
Aug 25, 2019
Chapter 38 : Are The Lords Of Information Gathered? Or Scattered? (Part 1)
Aug 25, 2019
Chapter 37 : The Drunken Horse Bush Appearing In The Human Village (Part 2)
Aug 25, 2019
Chapter 36 : The Drunken Horse Bush Appearing In The Human Village (Part 1)
Aug 25, 2019
Chapter 35 : Who S Spreading Demagogy? Part 2
Aug 25, 2019
Chapter 34 : Who S Spreading Demagogy? Part 1
Aug 25, 2019
Vol.4 Chapter 33 : The Rulers Of The Truth (Part 2)
Aug 25, 2019
Chapter 32 : The Rulers Of The Truth (Part 1)
Aug 25, 2019
Vol.4 Chapter 31 : Is The Bull’S Head Somewhere Out There? (Part 2)
Aug 25, 2019
Vol.4 Chapter 30 : Is The Bull’S Head Somewhere Out There? (Part 1)
Aug 25, 2019
Vol.4 Chapter 29 : A Kappa S Grimoire (Part 2)
Aug 25, 2019
Vol.4 Chapter 28 : A Kappa S Grimoire (Part 1)
Aug 25, 2019
Vol.4 Chapter 27 : Kokkuri Scatters With The Cherry Blossoms (Part 2)
Aug 25, 2019
Vol.4 Chapter 26 : Kokkuri Scatters With The Cherry Blossoms (Part 1)
Aug 25, 2019
Vol.4 Chapter 25 : Unattributed Words Are Easily Stolen (Part 2)
Aug 25, 2019
Vol.4 Chapter 24 : Unattributed Words Are Easily Stolen (Part 1)
Aug 25, 2019
Vol.4 Chapter 23 : Tobacco, The Tanuki, And The Dine-And-Dasher (Part 2)
Aug 25, 2019
Vol.4 Chapter 22 : Tobacco, The Tanuki, And The Dine-And-Dasher (Part 1)
Aug 25, 2019
Vol.4 Chapter 21 : Rodent-Infested Summer (Second Half)
Aug 25, 2019
Vol.4 Chapter 20 : Rodent-Infested Summer (First Half)
Aug 25, 2019
Vol.3 Chapter 19 : The Skeptical Book Renter (Second Half)
Aug 25, 2019
Vol.3 Chapter 18 : The Skeptical Book Renter (First Half)
Aug 25, 2019
Vol.3 Chapter 17 : The Shady Love Letter (Second Half)
Aug 25, 2019
Vol.3 Chapter 16 : The Shady Love Letter (First Half)
Aug 25, 2019
Vol.3 Chapter 15 : The Short-Lived Seven Wonders (Second Half)
Aug 25, 2019
Vol.3 Chapter 14 : The Short-Lived Seven Wonders (First Half)
Aug 25, 2019
Vol.2 Chapter 13.5 : Volume Two Bonus Sketches And 4Koma
Aug 25, 2019
Vol.2 Chapter 13 : The Aftermath Of The Miracle Mallet (Second Half)
Aug 25, 2019
Vol.2 Chapter 12 : The Aftermath Of The Miracle Mallet (First Half)
Aug 25, 2019
Vol.3 Chapter 11 : Traditional Performing Arts Of Darkness (Second Half)
Aug 25, 2019
Vol.2 Chapter 10 : Traditional Performing Arts Of Darkness (First Half)
Aug 25, 2019
Vol.2 Chapter 9 : The Inari S Hood (Second Half)
Aug 25, 2019
Vol.2 Chapter 8 : The Inari S Hood (First Half)
Aug 25, 2019
Vol.2 Chapter 7 : The Requirements For Raising A Rare Beast (Second Half)
Aug 25, 2019
Vol.2 Chapter 6 : The Requirements For Raising A Rare Beast (First Half)
Aug 25, 2019
Vol.1 Chapter 5.5 : A Youkai Fairy Tale
Aug 25, 2019
Vol.1 Chapter 5 : Privately Published Night Parade Scroll (Second Half)
Aug 25, 2019
Vol.1 Chapter 4 : Privately Published Night Parade Scroll (First Half)
Aug 25, 2019
Vol.1 Chapter 3 : December Youkai Extermination (Second Half)
Aug 25, 2019
Vol.1 Chapter 2: Youkai Extermination December
Aug 25, 2019
Vol.1 Chapter 1 : The Illusionary Rare Book