User blog comment:Crimson and Darkness/Volume 24 discussion blog/@comment-73.57.25.92-20180105151426/@comment-2601:8C:601:5692:301C:7B46:8FA7:99BE-20180111203725

@B214 I believe you should be aware that SD volume 1 has been released as a light novel with some changes. As far as I can gather from his blog posts, Ishibumi intends to release volume 2 directly as a LN at the same time as HSDxD volume 25. Honestly, he has had plenty of time to continue the web novel version, but probably due to the plans for a LN release, Fujimi Shobo kept him from releasing more web novel chapters. Hence, it is probably SDv2 that is already completed.