Releasing on Valentine's Day... Huh.
I can't help but think this timing means something on UFA's part, for example:
"Hey, let's aim for all the wotas too pathetic to know any girls for Valentine's Day! They'll be all depressed from not getting any chocolates from girls and will have no one to spend money on except Swimsuited Wonky! PERFECT!"
How sinister...
Or am I just paranoid?
EDIT:
Commentary by Risa was on Konkon's Alo-Hello, maybe they think it's a better idea to have girls who can discuss with each other than having just one girl stumble around for things to say. Risa+Eri has been a pretty dynamic combo too, wouldn't you say?
Regarding Reina instead of Eri, maybe Eri used up her Hawaii trip for the year for the 17sai photobook. Even though that wasn't Alo-Hello, it was still in Hawaii, right?