Man, I'm an idiot. I've been following the artist on Twitter, but it never even dawned on me to check for an English scanlation until just now. This thing is too adorable for words.
>sooo what is really her name? futaba or anzu?
Futaba. She introduces herself in chapter 21.5. Anzu is her nickname. I don't know how she got the nickname, but Anzu is "a representative Japanese name with a meaning symbolizing ripeness."