There was one young man with a modest name Yusuki Yagami. Lived, but not grieved, and the word "sex" didn't know anything, even how to spell it. Thus he lived somewhere to 15 years when one event dramatically changed his childish world view. Somehow earlier than usual returning home from school, he found his mother, very actively modify his father. This event is so affected the unstable psyche of children that very soon our young hero of the