Kobato
I was shocked that CLAMP referenced Kohaku so soon. The connection to Wish was painfully obvious but I still expected CLAMP to drag it out longer. Mostly because CLAMP was always hush-hush whenever anyone asked them if there was a connection between Wish and Legal Drug.
And Kobato's interaction with Fujimoto was so damn cute! With each chapter I end up loving that pairing even more. I really hope that CLAMP doesn't do "the normal" with them. I know making their pairings suffer is their thing but it's time they did another CCS-type manga where there's no angst and everyone ends up happy.

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...I'm not caught up on Kobato. :D; wanna splain?
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And then in the most recent chapter Ioryogi and a bird overhead Kobato singing and they start talking about Kohaku.
I don't know if Kohaku (or any of the other Wish characters) will show up but there's definitely a connection between the two series.