Remember how Makimoto wasn’t actually given her own route in the main VN despite the fact you could almost see the words “potential heroine candidate” painted on her forehead? Well, these two light novels fix that, and do so in a… decent enough way. Which is what Jingai has always been, I suppose: decent enough.
Dies irae: Song to the Witch is the second light novel spinoff to Dies irae (the first one being Wolfsrudel, which I have yet to read) and was written by Fujii Sanda, with insert illustrations by Minatogawa Kazuomi, the artist for the Dies irae manga adaptation. As clearly implied by G Yuusuke’s beautiful cover art, the novel features Rusalka and Beatrice as its two main heroines, and chronicles their exploits in the United States of 1962, where they face off against a mysterious new foe: the powerful witch known as Marilyn Monroe.
JP title: 装甲悪鬼村正 妖甲秘聞 鋼
So as you may or may not have heard, there was a Muramasa spinoff-novel (I mean an actual novel, not a VN) written by Haganeya Jin and released all the way back in 2011 called Youkou Hibun Hagane. Well, four years later, they actually did a re-release of it, with the main difference being that the illustrations (by Namaniku ATK) are now in full-color. The novel’s story takes place during the infamous Nanbokuchou period (hundreds of years before the visual novel’s events) which was actually lightly touched upon in the VN, too: a lengthy and tremendously violent conflict that earned the Muramasa clan its infamy as a bloodline of Tsurugi that brought about calamity, bloodshed and insanity to the lands of Yamato. So now we get to read about how that actually happened! Fun times! (spoilers: lots of people die)