He finished it, and:

As you might expect, the anime's ending stumbled because the original manga is still ongoing. This gave the Tasogare Otome x Amnesia anime basically three choices: (1) A non-ending ending, which seems to be the most common cop-out, (2) an original ending after diverging from the manga (Full Moon wo Sagashite did this with amazing success), or (3) a real ending that the original (but still ongoing) manga later attempts to follow or improve upon, as in the case of the Neon Genesis Evangelion manga.

Well, the Tasogare Otome x Amnesia anime took the first choice...sort of, but did it in a way that is both better and worse than the typical non-ending ending: It has an original ending which is actually pretty good, but then at the last minute it turns into a non-ending ending, betraying any emotional investment or payoff it might have achieved had it just wrapped things up there. I'm not sure if Silver Link simply chickened out, or if they have hopes for a second season.

More spoilery explanation follows at the source. I was thinking about Tasogare Otome &/at/by Amnesia, even though generally I never finish horror titles (the last attempt was 11 Eyes). But this is disheartening.

UPDATE: Tappan ate it:

Still the ending as a whole was so good that even the nonsense during the final credit roll was unable to ruin it.

It's like The 08th MS Team all over again!