Group Crayon Pop's carol song 'Lonely Christmas' has been accused of plagiarizing the theme song of a Japanese animation, but the agency revealed that they did not do it intentionally.

Crayon Pop's agency Chrome Entertainment said during an interview today, "We are currently checking with the producer of the song for the plagiarizing issue of 'Lonely Christmas'. We found out today that it's similar to a theme song of a Japanese animation."

The representative continued, "After we finish talking with the producer, we will publicly announce our side of the story. The members are having the hardest time from this issue."

Photo Credit: Crayon Pop MV