HIGH4 Sunggu, who shed tears at the beginning of his performance on “Inkigayo,” announced that he was sorry for being unable to control his emotions.

During a call with OSEN after his performance, Sunggu said, “Although it was a live stage in which a lot of people worked hard to pull off, I was unprofessional and failed to control my emotions. I am very sorry. I am sorry for causing any trouble for viewers, staff members, and fans.”

“A close agency worker, who had been like family to HIGH4 even before our debut, collapsed yesterday due to overwork. I felt so bad for her because she had been working nonstop for HIGH4. I know that she has rarely been sleeping for 15 days to prepare for our comeback with ‘Day By Day.’ I hope she quickly regains her health,” he said.

HIGH4 will be releasing their newest song “Day By Day,” five months after their first mini album “HI-HIGH” from last year.

Watch HIGH4’s “Day By Day” performance on “Inkigayo” here: