Ah, Romancing Saga. I only played part 3 and the PS2 remake, though
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@episode: Uhm ... it was okay-ish. The class description felt oddly familar. I cannot remember to have read the corresponding manga chapter as I ignored the manga so far. Kobato's evil speech and being roasted in return was one of the funniest things in this episode. The usual Yozora <-> Sena quarrel was boring in comparison to the Monster Hunter episode.
I found Maria actually quite nice with her onii-chan reaction when Kodaka gave her the lunch box. Seeing the full cupboard of potato chips seems like she did a tons of work for Yozora already (if it's 1 pack per task). Other than that? The "special effects" when Kobato switched to vampire-impersonating were done well. And Rika's happy expression when she's not in pervy-mode was lovely.
Though, the personal highlight for me was the end when Kobato sneaked in her onii-chan's bed. It was simply too cute. I don't have a straight imouto bias, but if it's done well I certainly will not complain.