Prior to the concert, on September 14, the fan regularly took to social media to begin planning his outfit, starting with, "This is sudden, but I'm considering trying IU cosplay. If I dress like this, will I be sued?" Another Japanese fan was quick to comment, saying, "I don't think that'd be a problem at all. There was a lot of that at Girls' Generation's anniversary concert," to which he replied, "Is that true? I'd have to dress into it at the hotel, get on the subway, and go all the way to the concert venue in it. Wow, I'm ashamed just imagining it." Another fan was quick to encourage him, saying, "I think if anyone could pull it off it'd be you!"