When the girls with the summoning book in hand chant a spell in the classroom at night... an old man incubus appears!? The girls are furious at the incubus that appears in the smartphone game because it doesn't look like a handsome guy! The girls' mood is dropping. However, since the old man incubus has been summoned, he can't just go back to the demon world without doing anything. So he uses his demonic lust and superb technique to make the girls in front of him cum! No one can stop the unrivaled dick of the demon world that shoots endlessly!