A rumour is circulating on the internet that you can summon a succubus with a secret spell if you don’t masturbate for 72 days. Young Takashi, who actually has a strong libido, takes up this challenge … and succeeds! But strangely enough, the succubus, who goes by the name Eri, looks like his stepmother …
サキュバス喚んだら義母が来た!?, Succubus Yondara Haha ga Kita!?, I Summoned a Succubus and My Stepmom Appeared!?, Succubus Yondara Gibo ga Kita!?, 서큐버스를 불렀더니 엄마가 왔다!?