Wouldn't P-cups be even larger than that? Regardless, give the poor girl a break. Preferably before her breasts break her back.
I'm guessing that either perspective is messing with our perception of the actual size, or they're simply in the middle of growing towards P-cup size.
P-cup
17,839 twe-
actually referring to Idolmaster Shiny Colors' "Producer's Cup" event, which caused P-Cup to trend to many people's confusion and misunderstanding