Boyfriend's maknae Minwoo shared his special memory of working with the talented IU. Before debuting with Boyfriend, Minwoo was featured in K.Will's music video for "Can't Open Up My Lips" as the boy who had a crush on IU. Following the MV release, he became the #1 searched topic for the term, "IU's younger man." When asked about what it was like working with IU, Minwoo answered, "She was a lot prettier in real life." He added, "She's a sunbae I admire and like. It was the role of a boy who had a one-sided crush, but I was happy with just the fact that I was able to work with her." The filming of the music video was said to have taken 12 hours. As a gift of support, IU also surprised Minwoo with a singing performance. Minwoo said, "IU sang me a song during break time and she was really good. She must have been tired, so it was memorable to see her care about me." Source: Seoul NTN via Nate