I'll keep it short. If you've seen the original 12 episodes, these 4 are a MUST watch. Even if you found the original a bit boring (like me, who gave it a 7/10) you will not be disappointed with "Kamichu! Specials". You can watch all 4 episodes after finishing the original 12; even though episode numbers here are: 7.5, 9.5, 10.5, 12.5. Art and animation is of same quality. In terms of plot-progression, these episodes are much heavier, especially the last 2. Writing is definitely of higher quality too and won't leave you disappointed. For a Slice of Life type anime, I found the ending satisfying. 9/10