Mitchell Bowran and Charlie Star, both now 22, have been facing trial in Melbourne County Court during the past week over five charges and three charges of rape respectively.

In his closing argument in court on Wednesday, Crown prosecutor Peter Triandos went over the events at the party at a Kergungah property on September 2, 2017.

He alleged the two men took turns to penetrate the woman - at one stage while laughing - before returning to the party.

"(The victim) was alone behind the shed. It was dark, she was alone and she was shaking. You've heard her describe that," he said.

The men have denied the sexual activity was rape, saying the teenager gave her consent.

Mr Triandos said although she consented to kissing Bowran, that was different to consenting to sexual penetration.

He repeated lines from the victim's interview with police where she said she told the men to stop and said "I don't want to do this anymore".

"I was just frozen there," she told police.

"I was just really scared, I didn't know what they were going to do next."

RELATED:

Mr Triandos said the victim claimed her head was slammed into the ground. Photographs taken later that night showed bruises and scratches on her legs and stomach.

The jury has heard evidence from the victim, her mother, her friend's mother who took her to report the alleged rape on the night, and other guests at the party.

They are expected to start deliberating on Friday.

A "raw and experimental" sexual encounter behind a shed was not rape but a regretful experience, defence lawyers have argued.

Barrister Hayden Rattray said there was no evidence to corroborate the story that his client Mitchell Bowran or friend Charlie Star raped a 17-year-old girl.

He argued her reaction to consensual sex could have been "oh my god, what have I done?" plus her worry that someone filmed them gave her motivation to lie.

"There's no doubt she was crying when she came out from the side of the shed, the question is 'why?'," he said.

"It is unclear where the truth lies."

Defence lawyers both used their closing arguments to remind the jury of the evidence of one guest at the party who said she heard the victim laughing behind the shed with Bowran, not screaming in pain as alleged.

Mr Rattray questioned why the young men would inflict a "violent and cruel" rape at a party where they could have been seen or heard by people close by, and why the teenager did not call for help as people looked to see what was happening behind the shed.

"Working out whether someone is telling the truth or not is not easy," he said.

Star's barrister Charles Morgan said the fact his client lied about having a girlfriend, and had sex with the 17-year-old before leaving her alone behind the shed, painted him in a bad light.

He said the actions may have been immoral, but were not illegal.

The court heard neither Bowran nor Star had any criminal history.

Mr Morgan accused the victim of saying the two men raped her because she was humiliated by taking part in raw and experimental sex.

"She did that to deflect any criticism that might have created shame," he said.

"It's explainable that she did this, but not right or fair."

He said the likelihood a rape would have been committed where people could have seen them "doesn't pass the pub test" and asked the jury to consider the victim an unreliable witness.

Receive our daily newsletter straight to your inbox each morning from The Border Mail. Sign up here