A teenager has admitted to causing the death of Melbourne legal studies student Laa Chol last year, but has denied he intended to kill her.
The youth is on trial for the murder of Ms Chol on July 21 last year.
The Supreme Court of Victoria heard he had pleaded not guilty to murder but has pleaded guilty to manslaughter.
Ms Chol, 19, died sometime after 5:00am after being stabbed during a party being held at a short-stay apartment in the QTower, in Melbourne's CBD.
The legal studies student and soccer player was with a group of young women staying at the apartment in A'Beckett Street.
Her accused killer was 17 years old at the time of her death and cannot be named or identified for legal reasons.
Prosecutor Kristie Churchill told the jury the teenager was with a group of five young men who arrived at the party uninvited at 4:14am.
Ms Chol was not happy that the men were in the room and was also searching for her missing phone, the court heard.
"No-one's leaving here until I get my phone back," Ms Churchill said Ms Chol said at the time.
The court heard she got into a violent struggle with the teenager.
CCTV footage was played to the jury showing Ms Chol and the youth in the corridor of the apartment complex.
"Ms Chol stumbles back to the apartment and collapses," Ms Churchill told the court.
"The death of Ms Chol was determined to be caused by a single stab wound to the chest."
Ms Churchill said the youth intended to kill or cause Ms Chol serious injury and that the manslaughter plea was "not sufficient".
"The accused intended to cause Laa Chol really serious injury," she said.
But defence lawyer Sam Norton said his client "is innocent of murder".
"He is guilty of manslaughter," Mr Norton said.
"He admits he caused the death of Ms Chol.
"He admits that he stabbed her.
"He admits you should convict him."
The dispute at trial, the jury heard, was whether he "did so with murderous intent".
The trial before Justice Stephen Kaye continues.
