I think I saw the first one, also on a plane! It really wasn't very good, though I loved seeing some of the sets brought to life.

OMG. Shouji! I curse his name even as I understand why he cheated! I love love love the scene in vol. 4 where Cute Nana's just standing there crying after finding out and Punk Nana goes after Shouji for her.

Umino Chika is doing a shounen manga as his/her next project after H&C, apparently. How crazy is that?

I know! I am somewhat confused, though will see how the first vol. is when it comes out.