Well, the 4th book will be about human trafficking, so it will be a deep and hard story to pull off which will happen in China because one of the Japanese characters of the story meets her love interest parents in China, since her love interest is Chinese, but when her parents find out about the two of them together, they will not like it and decide that one of the girls or both, will need to be sold into human trafficking, so while it will be hard to write, I'm looking forward to see how they will survive and still be with each other.