Yes, this is the last chapter in Volume 1, the serialization is in one of the magazines we try and follow so hopefully we can keep this updated as there is a lot of interest it seems...
@HermesPasser The grandma was probably friends with the Queen, and the Queen wanted to experience life as a human so she re-incarnated herself into the grandma's bloodline. That's my guess.
I don't mind this manga, but I really wish the paneling and layout was better. I have a problem following what's going on sometimes because of how it's panelled and how events are shown. Feels almost like a clusterfuck, especially in this chapter.