Upsides: This is a colorful and fun hentai, with many different species of monster girls just like the game that inspired it. This is also a rare example (the only I know so far) where female dominance, including reverse rape, is prominently featured and the guy doesn't turn tables at the end.
Downsides: The story is very poor and not engaging at all. You just see scenes repeating in sequence and you barely know what's happening. Also, the hero is a child and his voice is provided by a woman; although this is quite common in Japan, I find this kind of weird.
It seems new
episodes are still coming out. Well, I would like to watch them.