Here's another old millim favorite of mine. I don't think anybody that asked me for recommendations on Korean music a couple of years ago got away without hearing them :p
Sadly, I know next to nothing about Protein Puppet or 단백질인형, which is the actual name in Korean. They've been on millim since at least 2002 and late 2004/early 2005 they were still active as the original "demo" suddenly was replaced by two "demos". What I like the best about Protein Puppet is their amazing shoegazer influenced rock songs, but their modern rock and trip hop stuff too is incredibly good for a band unsigned this long.
Unfortunately, again, my favorite song is no longer available at millim. In fact, Raining isn't even listed on the site anymore. Well, the songs below aren't that bad either. The first song is a great example of the Protein Puppet rock style while the second represents their more electronic side ^^
Cry [left click]
To heaven(추모곡) [left click]