Saki lost her husband five years ago, but she soon raised her child without much trouble. Until one day, she learned that her son was being bullied at school. She decided to solve the problem and invited the guy to come to the house to talk. The guy surprises her with an outrageous request: to have sex with him in exchange for stopping the bullying.
Saki agrees and sacrifices herself for the good, but what she forgets is that young men have long-standing stamina!