What a nice thing of you to say, Sofia! If you’ve played Rune Factory 3, you’d know that this particular character has a habit of speaking in opposites, so Sofia here is actually trying to say that she quite fancies you.
Anyway, it’s quite suggestive language for an ESRB-rated “E for Everyone” game — in Japan, the appropriate phrase of disbelief would be, “CERO is A in this software!”
See also: One of Luminous Arc’s worthwhile moments
[VIa Overactive VI]