Alright, this is how the outfits should have been as one of these were worned by Neko Musume (in which only happened in 2007 series, since the others don't usually do this aside of dress and shirt). What I created on this very first expansion pack was the first set of Neko Musume's Mid-Year outfits, which was exclusively be used for "Neko Musume (Gegege no Kitaro 2007)" model. Formal outfit is already included at "Aria Brestein" back then, but if you want to use it while experimenting with the other model, so be it (but it will cause a huge confusion).

Note that the clothing model must be above 0.8-1.0, should either of you using this pack, or else, it will not properly going to work.