Chapter 19
Koha-Ace stars Kohaku and features characters from various TYPE-MOON series. It is drawn in a super deformed style, and it is a self-aware series that constantly breaks the fourth wall. (Source: TYPE-MOON Wiki)
Chapter 10
New Serialization by Keikenchi, "Gudaguda Ace RE" Begins!A complete change from the usual manga format !?This time, Okita from the Shinsengumi era appears!(From Comptiq)
Chapter 15
A collection of short comedic stories centered around the world of Mahoutsukai no Yoru published by Kadokawa.
Chapter 0
Remake of the Imperial Grail War from the Koha-Ace manga. The protagonist is Akagi Kanata, who gets transported 75 years to the past to participate in a Holy Grail War in the midst of World War 2.