A man who had sex with a 14-year-old student was sentenced to a year in jail on Wednesday.

Suhaimi Shamsudin, 24, who is appealing against the sentence, pleaded guilty in January to two counts of oral sex with the minor at Housing Board staircase landings in October 2012.

Six other charges, including committing an obscene act, were considered during his sentencing.

Deputy Public Prosecutor Sharmila Sripathy-Shanaz had told the court that Suhaimi, who was a Nanyang Technological University student, and the minor met through a mobile applications in early October 2012. The minor subsequently told Shamsudin he was 14 years old although his profile listed him as 17, the minimum age required to use the application.

One week after befriending each other, the minor suggested meeting in person. Suhaimi agreed. They met at Block 484 Admiralty Link and proceeded to the staircase landing on the 15th floor where Suhaimi had oral sex with the minor after performing some sexual acts on him.

They met again at an unknown HDB block near the minor's school the second time that month.

The incidents came to light when the minor, uneasy about his sexual inclination and experiences, confided in a police officer whom he had befriended. He made a police report on Jan 3 last year stating that he had engaged in "unnatural sex with two male subjects'' between October and December 2012.

District Judge Mathew Joseph said the court found it disturbing that Suhaimi proceeded to meet the minor after the teen's true age was disclosed. "Your subsequent sexual acts with the victim were, therefore, the conscious and calculated decisions of a mature adult,'' he said.

The maximum penalty for the offence is 10 years' jail and a fine on each charge.