yet another NiseMIDIdoronokai great stuff. This is the omake (in case you stupid don't know, an omake it's a litttle tiny book release before or after a doujin, sometimes with an epilogue or just for sell more) for Nakaba 2. Unlike the doujin this one is Black and White, and it don't have nothing to do with the doujin.
Final Call: Really worth to download, do it manually and save money.