Fans were originally under the impression that it was live due to the audio quality being so good, only to be surprised that it wasn’t. People are upset since it’s a ballad song with no dancing, which means it wouldn’t be that hard to sing live in the first place. Many people are making fun of the group by calling their showcase a “lip-sync concert”.
Also, people note how Kim Wooseok (who sang before him) and Han Seungwoo (who sang after) were able to lip sync properly yet Cha Junho couldn’t.
"You didn’t even practice lip-syncing. What can you do?"