I think the animation studio did a very good job in developing kotonoha as a character, so far Sekai seems rather like a sub character than a main heroine to me. Gotta admit, Kotonoha is growing on me, I mean sure she does seem hard to please but then again, if you think about it, she's new to this so you can't blame her for acting that way. Makoto well I don't really have anything to say about him except that reading a Swimsuit megazine on a date is teh lose...
Anyway, I am seriously hoping for a happy end.