At the 69 Club, the show girl Naomi opens on the stage without nipple rings, yet as the scene proceeds, nipple rings appear, disappear and reappear on her.
In the CG scene where Ozaki rides towards the bridge to meet Akemi, the CG render of Ozaki has him wearing a red T-shirt, yet his actual anime drawing has him wearing a brown leather jacket.
During the sidewalk demon sex scene, the woman is placed on the hood of her white car which is long enough for her hips to rest on. However, in a downward close-up of her hips, the hood of the car below her is blue.
During the sidewalk demon sex scene, the woman is only wearing stockings, but near the climax of the scene, her left stocking disappears in a close-up.
As Ozaki and Yuri pause in their discussion near the part two's climax, we see a red boat pass behind the fence Ozaki's facing on the river. In the first long range shot the boat appears dangerously close to the fence and has a white trim. In the next shot, the boat is farther away with no trim and does not appear through the fence.
In a public boxing match, Ozaki punches a rival student so hard the impact crushes the student's skull, killing him and the only people to notice includes one woman in the audience and most importantly the referee, who is seen hunched over the student's body. Ozaki is then later shown calmly walking out of the building as if nothing happened rather than being arrested or held in custody for questioning.
Seconds before a demon murders a girl, pause the first frame and look closely at the girl before his tail wraps itself around her torso: the girl's face isn't drawn in and her previous head of hair is bald.
During the second part, a huge ball of bright CG light soars through numerous city blocks in Tokyo. The entire time during and afterward, the light is never questioned or mentioned by the public.
Despite the shocking, inhuman brutality of the sidewalk car girl scene. It is never mentioned nor brought up by the general public.