Female and Lewd: A Scratchy Itch in My Ass

Overview:

Late at night at the office. Shizuka Tani swallows a snail from a tank and is rushed to the emergency room. She was unharmed, but the whole company was talking about her. One day, Shizuka starts to masturbate in her room while listening to her sister and her boyfriend having sex, and an insect worm, which claims to be a servant of Enma the Great, appears from her anus…