NU'EST may be picking back up with the story they left behind.
The boys had started a series with "Overcome", where their 'queen' had gone missing. "Love Paint", which came after "Overcome", actually continued on the story with the words 'Waiting Q' in the MV (Q for Queen). The boys unfortunately could not continue with the story as 4 out of the 5 boys were on 'Produce 101'.
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However, it looks like the boys may be picking back up with the story, as the same phrase 'Waiting Q' appears on their 2000-day photobook's cover.