Rejoice! The sixth volume of Eromanga Sensei's light novel series is out in English, thanks to Novel Updates. A lot of important stuff happens at the end, though the beginning is just him flirting with Elf and Muramasa.
So much happened that I'm not even sure what is left to write about in the remaining series, but I guess we'll find out once it's translated. There are three volumes yet to be translated and even more yet to be written. It sure would be nice if a second season of anime covered all this new material, huh?