#055 of 2D Dream Novels. There are a few works sharing the same title, the most popular one is Black Package's work which you can also found on EHT, but they are not related at all. The other things they have in common, is the metaphor of ominous black lily, "クロユリ/kuroyuri" in Japanese.

Another thing to say, if you track down the illustration artist's work, you'll find him evolved quite a lot.

The next upload will be #056.

English Info:
http://doujinshi.mugimugi.org/book/264359/