What is the benchmark to say a single's sale was successful? Must it be always be better than their highest selling single to date? Even stock/shares have their ups and downs. Do you close down just because you are not number 1? In that case companies like Microsoft and IBM should have closed years ago. Do schools close down because they are not the number 1 performing school? Looking at the sales, the is doing quite well. NGT48 excels in other areas, just not CD sales. Most of the members don't even have a CD player, so you can guess how their fan demographics is like. Is the single the worst selling single in Ariola Japan's family of releases? I guess NGT48 could be one of the better selling artist.