So this was it... Cute, clear confession. If only she hadn't taken it back... Though the way she did it implies a lot of stuff (for instance, isn't she indirectly trying to confirm Shamiko's feelings?). Too bad Shamiko's brain does not have enough capacity to process it all.
For irony, the fish persistence with Ryoko is closer to real brainwash compared to what Shamiko did. Dunno what Ogura will do with the fish but I could not feel bad for it (maybe she'll just throw it down a river like in the volume cover?).
I find it interesting that the magical girl transformation is reversible (unlike what that critter from the credit does), though it sounds reasonable if the wishes are not redeemed in advance... Still, I imagine the contract cannot be signed again by the same person, otherwise this would have been an easier way for Momo to find about Sakura.
(BTW, I'm somehow pissed a certain troll used the confession almost word for word as an "argument" recently... time to block that jerk for good [/personal rant])