This episode is about Nekoi Yuzuriha and… well… It's CLAMP, and sometimes you have to accept that these things weren't so frowned upon back then… but I really don't like Yuzuriha's fixation on Shiyuu Kusanagi. I'll just pretend it's a platonic relationship. In this episode, Yuzuriha tells us why it's so important to her that the people she's going to interact with can see Inuki. I don't remember this flashback being in the manga, but I think it adds a bit more weight to Inuki's importance in her life, and why it's so necessary for her that others can see him. I'd recommend watching this episode so it hurts more if something happens in the next few chapters (I'm not giving anything away, but it's obvious this anime is laying the groundwork to hit us when we least expect it).