Yeah, the road of analyzing anime anatomy ends in madness, but my guess is that shot would be either the stomach, the bottom of the lung, or the intestine. Which are all admittedly not very good places to get shot either.
Please listen.Sorry, but... could you call an ambulance?Sonya? Wha...?You were my target all along.Sorry for keeping quiet...Yasuna, I've shot you twice in the liver. I'm afraid you're already beyond help.