Darren Fleming preyed on his victims including at his own home in Kilsyth.
The girls were as young as eight and nine when the now 24 year-old first began abusing them.
Fleming himself was a teenager at the time of the crimes which occurred between 2011 and 2016. But that was not the end of the matter.
For both victims ultimately made the decision to report their ordeals to the police.
And their hard-hitting evidence led to Fleming being convicted at the High Court in Glasgow on Thursday (July 22).
Tattooed Fleming - who denied the accusations - was convicted of two rape charges.
Sentencing, Lord Armstrong told him: "I have read the victim impact statements.
"The terms clearly indicate the harm caused.
"You callously robbed them of the innocence of their childhood.
"I note that you continue to deny responsibility for the crimes and have displayed no empathy for your victims.
"I must recognise that the offences are disturbing and grave."
Fleming was put on the sex offenders list indefinitely.