An overview can be found on my previous review of this series.
They didn’t add a new character. Well, not directly. We have a sister who is now spoken about and the catalyst of the action this week but she wasn’t directly seen in this episode. Instead, we see Tanaka try and tackle a shopping trip and we get some more development from Shiraishi which was nice for a change. The result of these changes was my favourite episode so far as it really felt like we were finally starting to move somewhere with the existing characters. That, and I liked the meal he ended up with after shopping.