Youkai Gakkou no Seito Hajimemashita!

Chapter 19.5: Side Story - Renren wants to get stylish?
Chapter 19: Izuna and Rintarou (Part 3)
Chapter 20: Izuna and Rintarou (Part 4)
Chapter 19: Izuna and Rintarou (Part 3)
Chapter 20: Izuna and Rintarou (Part 4)
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.