That does sound like fun. I don't know much about parties and I'm afraid that unless it's music that you've taught me about or Japanese stuff from before I moved here, I likely don't know about it, but it does sound interesting. I do know various styles of manga from that time.

[ Never be sorry. Koutarou is also a nerd in his own way. ]

So a theme party of some sort. There are a lot of different options if the most important criteria is makeup and dressing up.