A high school student Morita Takashi, a boy with a high libido who wants to lose his virginity but can’t because he’s not popular with girls. One day, a message is sent to him with a proposal to summon a sex demon known as a succubus. To summon her, he must stop masturbating for 72 days and then cast the spell. Takashi strictly follows these instructions, and then when he casts the spell, he successfully summons the succubus. However, despite the fact that he successfully managed to summon a sex demon, he was surprised in the first place by the fact that it turned out to be his mother. Called out experienced succubus Eri (Erilyn) doesn’t want to have sex with her son, but she can’t resist the temptation of his attractive hard cock and delicious bodily fluids and allows him to lose his virginity in the succubus pussy…