(C91) Kono Megami o Uneune Okasu Usui Hon | A thin book where this goddess gets ravished sinuously (Kono Subarashii Sekai ni Shukufuku o!)
Echidna-sama no Himatsubushi Noroi no Necklace | Echidna-sama Is Killing Time - The Cursed Necklace (COMIC Reboot Vol. 04)