A 24-year-old former substitute teacher from Iowa who was arrested in July after admitting to a sexual relationship with a 17-year-old student says he swept her off her feet with love notes scribbled on Post-Its.

Mary Beth Haglin, of Cedar Rapids, has been charged with misdemeanor sexual exploitation by a school employee in connection to her six-month tryst with a male student at Washington High School.

On Wednesday, Haglin pleaded not guilty to the charge in writing, and her trial date has been set for November 14.

If convicted, she could face up to two years in prison and be required to register as a sex offender for 10 years.

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Bad teacher: Mary Beth Haglin (left and right), a 24-year-old former substitute teacher from Iowa, has been charged with sexual exploitation for having an affair with a male student

Haglin met the 17-year-old boy at Washington High School in Cedar Rapids in January

Haglin was hired as a substitute teacher in January and was terminated in May at the conclusion of an internal investigation by school administrators. An earlier probe conducted in February had failed to prove any wrongdoing on Haglin’s part.

Both investigations have since been labelled as ‘ineffective’ by the school district and led to the resignations of three high-ranking officials, according to The Gazette.

It is believed that Haglin and the victim had been in a sexual relationship for almost the entire duration of her tenure at Washington High School.

Speaking to Inside Edition this week, the 24-year-old woman apologized for the hurt she has caused, but claimed that it was her underage lover who seduced her.

‘He would come into my classroom, grab a Post-It, write something and stick it to my desk on his way out,’ she said.

One note read: ‘I love you so much, my empress.’

Teen Casanova: Haglin says it was the boy (seen right) who seduced her with love letters

Sticky love notes: Haglin shows the Post-It notes that her underage lover would leave on her desk after class

Regal moniker: One note allegedly penned by the victim read, ‘I love you so much, my empress'

In return, the statuesque brunette sent the high-schooler risque selfies showing her posing in sexy lingerie.

Haglin says the teen once called her 'Mrs Robinson,' in a reference to Anne Bancroft’s iconic character from the movie The Graduate, in which a middle-aged woman seduces a recent college graduate, played by Dustin Hoffman.

By her own admission, Haglin fell 'completely head over heels' for the boy, and before long the pair began having sex almost daily in her car at a public park.

Haglin says that after a while, she allowed herself to think that she was in a 'real relationship,' but it all came to an end when another student spotted her and the 17-year-old and went to the authorities.

In retrospect, Haglin says it was 'stupid' to think that their forbidden liaison, which she described as 'a terrible mistake', could be kept a secret.

Raunchy snapshots: In exchange for the notes, the brunette beauty sent the high-schooler risque selfies showing wearing lingerie

Outdoor romps: Haglin says she and the boy had sex almost every day in her car at this public park

Regrets: Haglin says it was 'stupid' to think that their forbidden liaison was a real relationship. The 24-year-old described what happened as 'a terrible mistake'

‘I want to go back and smack myself and ask, “What were you thinking Mary Beth?"’ she tells the site.

In an interview with The Gazette after her release from jail on bail, Haglin claimed school administrators were aware of the affair and told her to keep it ‘hush-hush.’

In the wake of this bombshell revelation, a trio of long-time school officials, including Washington High Principal Dr Ralph Plagman, opted for an early retirement.