The teenagers in the bedroom were not the alleged victims.
The 19-year-old, who had no previous convictions, was taken into custody.
Duty lawyer Kent Arnott said the three teenagers showed up to the house uninvited.
Arnott said the accused and his mother had since accepted they should not have let the teenagers into the house.
“He's certainly had time to reflect on things, as has his mother,” Arnott said.
Bail was opposed by police, however Judge Richard Russell granted the man bail at the Blenheim District Court on Monday, with the same conditions as previously, and with a new condition not to contact or associate with the three teenagers who were in his bedroom.