This VN is the second game in Whirlpool's short, low-price mimikko fetish game series... and I have to say my impression of it hasn't changed from the first one.  This is a direct continuation of events from the end of the first game, and basically it increases the number of mimikko-ninja in Haruki's harem... and nothing else.

Oh, it is moderately funny, the h-scenes titillate my mimikko fetish, and you get hints of a deeper setting once again... but its short length means that the game never really goes anywhere beyond what I mentioned above.