is this series finished?

It doesn't feel like it.

Yuyuko gets double the Youmu in the end. Lucky.

THERE SHOULD BE MORE. AHHHHHH. It says to be continued and my favorite characters only showed up as a teaser. Random web searches show it does seem to be discontinued though. The author's most recent works on their website are all original.

I wonder what the significance of the mackerel/fish thing was. What spell is encoded in the game. And why summer is when everything returns to normal. Very interesting and deceptively simple premise.

This series surely is interesting, specially since, what about the characters from the future games, as well the Sealing club? (Since, being an “alternate” universe... stuck in the late 2000s and early 2010s, would Sumireko be from the “other” side of the barrier, due to her being from the outside?)

Yukari, what did you mean you wrote the game? ZUN will copyright you

wow this was good