In a small town in Nagasaki, Japan, a 15-year-old girl named Aiwa Matsuo decided to hang out with her classmate. They went shopping, got some food, and headed back to the girl's apartment. The girl lived alone and Aiwa thought it would be fun to hang out at her place with no parents around to bother them. But the girl had other plans. The girl beat, strangled, killed, and dismembered Aiwa, including cutting off her head. The murder shocked not only the town but the nation as it was rare to hear of crime, especially murder. And even more shocking was that both girls were 15 and not involved in any drugs, gangs, or other criminal activity.—Medium