Hai is now facing the charge of having sexual intercourse with a child aged 13 to 16, according to Criminal Code.
The investigation was initiated following a complaint filed by the victim's parents.
They alleged that Hai, a Physics teacher, had taken advantage of the student after tutoring sessions, engaging in sexual activity with her on multiple occasions.
The student reportedly exhibited abnormal behavior, prompting her parents to investigate.
When questioned by police, Hai confessed to the crime.
Individuals over 18 who commit statutory rape multiple times in Vietnam could face a prison sentence of three to ten years.