Don't call this episode "the 26th episode" anymore. The story is cool and will give you kinda a break if you watch it during Kuro no Keiyakusha. This episode, between other things, treats on the relationship between Kiko and Yin, and furthermore : Yin and the crew (Hei, Mao and Huang). That is why I recommend to watch it a bit after Kiko (you know, that pink-haired girl crazy of cosplay) and Yin met in first season. I was amused to see how characters interact here and I liked this little side-story. Except this, nothing really change about art and sound, opening is still cool.