I'm looking for manga series that has, somewhere, even if it's a walk-on, actual penguins. Because they're cute, of course. I know about Ichiban!!!, and I suppose NGE counts. Yotsuba&! doesn't count, because the penguins are on TV -- I want them physically present in the story -- nor does Azumanga Daioh, because penguin costumes are not enough. Any others?
(This by way of compensating for the fact that I'm NOT AT ALL BITTER about Penguin Brothers and Penguin Revolution. The teases.)