Thanks for the kind words, and I'm glad you're enjoying the game! :)
If you didn't get Kana up to Love level 4 before Act 3, or you chose "That little idiot" when talking to Annie in Act Three, then Kana is gone I'm afraid.
If you did get her to Love 4 and chose "We have to go rescue her" then you can pick "check on Kana" from the main farm menu to see how she's doing.
Viewing post in PUBLIC RELEASE - v0.20.2 - KANA COME HOME! comments
Oh! Yeah, I think I choose that option. I thought that the mc said that phrase with the meaning: " Why that little girl is always doing reckless actions!? I'm mad worried now!", not that actually we would forget kana and abbandon her, Lol.
Guess I' ll have to reload to before choosing this option, if I still have a save that is not too far behind.