Oh wow, when I started reading this I didn't expect it to be the origin of that "I'm Patchouli the mage, everyone around me says I'm gloomy but I listen to hip-hop and stuff" meme.
I read that doujin some long time ago, but it was nice to give it another go! Only now I paid enough attention to notice what happened to Tewi (karma was pretty strict at her retribution) lol ...