xxxHolic serves as the perfect follow-up to the previous series, xxxHolic: Shunmuki. xxxHolic: Rou focuses on the manga-related plot element of Watanuki taking over the shop to see Yuko again, as well as granting the wish of Haruka. This seems to actually be an anime-invented storyline, but it's a blessing: Doumeki receives some much-needed character development which shows how he perceives Watanuki. I also believe that Haruka's developed relationship with Watanuki was key to Watanuki becoming aware of the egg. I believe this plot element could've worked out very well, had it been developed further in the manga. Unfortunately, it wasn't, though this isn't theanime's fault and it doesn't deserve to be penalized for this. However, the arc did seem to combine elements of the xxxHolic: Rei manga (specifically, Yuko's death and Watanuki's assumption of the shop) with the egg plot, which was in the main manga. However, as always, the writing in the series is well thought-out and there are no noticeable plot gaps. The animation as well is breathtaking and the sound fits as well. 9/10.