Mark and Yugyeom have learned a lot from the others, and their curiosity knows no bounds. It's safe to say that they are no longer the two pure boys they used to be. That, mixed with the other fives' fantasies, feelings, and own curious desires cause for eventful days, long nights filled with soft touches, and a lot more to learn. And of course, more lessons ;) -Book 2: Impure, is a sequel to Book 1: Innocent!- Please read "Innocent" if you haven't already to catch up on the plot! Otherwise, enjoy~