AmaterasuMisa's manga / #yaoi(4)

My only problem is that we don't actually have a lot of explanations on what is Happening. How did he get accomodate to the presence and need of Cain so fast ? Wtf is going on in hell ? Stuff like that make me feel like the chap aren't really complete or don't go as deep as I would like and so I can appreciate it as much as I could