Eris Sensei no Gakkyuu Houkai | Eris Sensei's Classrom Breakdown (2D Comic Magazine - Monster Musume ga Tsudou Ishuzoku Gakuen e Youkoso! Vol. 1)
Echidna-sama no Himatsubushi Noroi no Necklace | Echidna-sama Is Killing Time - The Cursed Necklace (COMIC Reboot Vol. 04)