Singer Wheesung made his onscreen comeback despite being less than 100% to say the least.

He's been complaining of severe stomach pains, but performed his new song "They're Coming" live on KBS2TV's Music Bank on October 14th.

It was very clear that he was suffering even during the pre-rehearsals, but pushed on to please his many fans that came out to get a taste of his new music live. As soon as his set was done, Wheesung was rushed to the hospital, where his reps say that he will be taking time off to recover.

The singer started experiencing pains on the 13th for another recording schedule he had, and when he checked in at the hospital, his doctor recommended that he immediately take time off from further activities to rest. However, as a professional singer, he decided to go ahead with his scheduled performance the following day.

The agency reps said that perhaps his body was weakened from pressures of his comeback not to mention his upcoming military duties. Wheesung will check into the Nonsan Training Facility in South Chungcheong Province to start his two year mandatory military service on November 7th.