Youkai Gakkou no Seito Hajimemashita!

Chapter 16.5: Night Parade Culture Festival ~The Past~
Vol.2 Chapter 16: My Best Friend (Part 2)
Chapter 17: Izuna and Rintarou (Part 1)
Vol.2 Chapter 16: My Best Friend (Part 2)
Chapter 17: Izuna and Rintarou (Part 1)
The side-story of "Youkai Gakkou no Sensei Hajimemashita", set 1 year before the events of the main story, following Maizuka Mamekichi's first year at Hyakki Academy.Serialized on Pixiv Comic.
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