A school librarian was jailed for having sex with a teenage pupil after a judge said that he carefully planned the abuse.
And the judge told Paul Rogers, 35, that he made the case worse by contacting her repeatedly in an attempt to get her to withdraw a statement about him.
Rogers met the girl pupil while working as a librarian in a Nottinghamshire secondary school. He took her to hotels after the relationship developed when she passed the age of 16, Nottingham Crown Court heard.
And after an investigation began, he used the internet to contact her, saying: "All I ask if you do one thing, please try and retract your statement."
Judge Jeremy Lea imposed a 20-month prison term on Rogers. He put him on a sexual harm prevention order for five years.
He described it as "sexual exploitation by an adult when in a position of trust," pointing out that it was also in breach of safeguarding procedures of the Nottinghamshire school.
The judge told Rogers: "From your position as a librarian, there was undoubtedly an unequal balance of power which was exploited by you for your personal sexual gratification."
He said there was "a significant degree of planning" and that sexual contact went on "for a significant amount of time."
Referring to later contact with the girl, the judge added: "You repeatedly asked her to retract her statement and continued manipulation of the complainant."
Rogers admitted five charges of breaching his position of trust by the sexual touching of a girl. He also pleaded guilty to perverting the course of justice.
He had been in custody since appearing by city magistrates last month. His address was given as Burton Lane, Hornsea, Yorkshire.
Lorraine Fox, prosecuting, said: "There was a typical element of grooming. He was spoken to and advised to keep a professional distance and reminded of his safeguarding responsibilities."
When the matter came to light, Rogers began to use internet accounts to contact the girl. That amounted to 135 pages.
After one plea, she responded by writing: "Stop please. I don't want to think about it any more."
Stefan Fox, mitigating, said: "This is a man with an otherwise impeccable character.
"The description must be a catastrophic fall from grace. His good character has gone and will never return."
The offences had wrecked Rogers' relationship with his partner, Mr Fox told the court. He said that Rogers accepted custody but added: "It would not address the cause of the problem."
Probation officers felt that Rogers posed "a low risk of re-offending," added Mr Fox.
The girl has now left the school. Her identity is protected for life.
Copy written by Rod Malcolm