>>532005604
I found it myself

>>532003903
I'm not sure... Theatre girl has a couple of locks of hair that hang in front of her shoulders, whereas Chisa doesn't. Also theatre girl's hair looks a bit wavy while Chisa's looks to be completely straight. But those are fairly minor differences so maybe it could still be Chisa. Also the clothes are completely different but characters can change clothes of course. It would be a little strange to have two characters looking so similar to each other. Maybe it's alternate reality Chisa.