Eh?
Voice acting was quite bad, animation smoothness was average but wobbly. The Sound effects lacked bass or loudness. Story was quite boring actually. Instead of trying to make it scary, you made it foolish. Some scenes looked like he was fucking someone. Seriously. I guess you should improve the smoothness of the animation and the story because it down right uninteresting right now. I see that you won't continue this series. Well in your next one think about all the things I said in this review. The olds man face looked Chinese but that doesn't really matter it just makes him a little childish if you know what I mean.
The devil looked like 21 year old boy. Try to implement some wrinkles or cuts on old, or devil like people to make them more horrifying or generally more detailed.