◆Beautiful mature woman suspense theater! The first instalment is the immoral escapades of a father-in-law and his daughter-in-law! ◆Earlier this morning, an unconscious woman named Nana was discovered in a room at an inn. Nana was diagnosed with an overdose of sleeping pills and had signs of strangulation. Furthermore, a nearby resident discovered a man hanging outside; the two are believed to be the father-in-law and the eldest son's daughter-in-law, and authorities are investigating the possibility that it was a double suicide. "However, for some reason, there were no signs of resistance on Nana's body..." What is the truth behind this?!