After my wife dies, the house feels far too large and empty until my son and his wife, Aoi, move in. I'm retired and home most days, while my busy son is often away, leaving Aoi and me alone together. Because she lost her father when she was young, she treats me with unusual warmth and attention. The problem is that she constantly walks around the house in revealing, careless outfits, tempting me with her body and gradually drawing her father-in-law across the line.