I just received this item after purchasing it from the official online shop, but I couldn't assemble the inner panels properly. I contacted them for help, but I still couldn't figure it out, so I'm putting it up for sale. I've removed the plastic wrapping, but the item is unused. I ordered it after seeing it on Megumi Kanzaki's YouTube channel. I will offer a 500 yen discount if you don't need the box and inner panels.