Youkai Gakkou no Seito Hajimemashita!

Chapter 17: Izuna and Rintarou (Part 1)
Chapter 16.5: Night Parade Culture Festival ~The Past~
Chapter 18: Izuna and Rintarou (Part 2)
Chapter 16.5: Night Parade Culture Festival ~The Past~
Chapter 18: Izuna and Rintarou (Part 2)
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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