I heard about this sequel from a blog called Onikirimaru (https://www.onikirimaru.com) that analysed it completely from a literary point of view.
It's really well-written and I think it's definitely superior to the prequel, which was mostly just a set of episodes about adventures, but nothing deep.
Virgin Soul is about a forbidden romance between a pacifist girl called Nina who changes into a killer red dragon when she sees handsome boys and a warrior king who has had to take extreme measures so that humanity can progress after the chaos Bahamut caused in Genesis.
King Charioce XVII is one very intriguing character, and he comes to realise his mistakes as events turn against him, and his secret plan is undermined. It's a tragic love story with tons of plot twists. I loved it!
If you like stories about dragons, curses and star-crossed lovers set in a fantasy world with beautiful landscapes and fun characters, give Virgin Soul a try!