Yui lived with her father, wanting to escape this life, she aspired to further her education and move to the city. To achieve this, she sought the help of her homeroom teacher, but in return, she had to offer her innocent body as a tool for sexual gratification. Her other corrupt relationships were discovered by her father, causing her plans to fail. She was left with no choice but to accept her father's penis, penetrated by his extremely thick member.
