Delusion Mania forms in Osaka (大阪)大阪.
Delusion Mania was a visual kei band in Osaka. They were active around 1998 and are now disbanded.
There was a listing for a tape from Delusion Mania on mercari (https://item.mercari.com/jp/m78947778421/) that says one of the members was Shimizu from Cosmo-Shiki. I can't find any confirmation of whether or not this was true and if so, what member (I'd assume iam?).