Keligh Jerard Botting will appear in the Royal Court on 15 June to be sentenced by the Superior Number.
Mr Botting also faces another charge for resisting arrest on 27 January.
His Advocate, Lauren Glynn, has asked for a psychological report to be carried out before the next appearance in Court.
Yesterday, Mr Botting was remanded in custody.
Before he left Court, the Bailiff William Bailhache told him: “I should warn you that as a result of your guilty plea you are now subject to mention in the sex offenders register under the Sex Offenders Law. The period after which you can appeal to this mention will be set upon sentencing.”