For those wondering about the parent/child relationship, these are all images that Kurachi Mizuki draws when they defeat the EX Stage boss of a game, presumably for the first time; not sure about which difficulty level. I've only included the EX boss pics here. They are playing the games out of order (and because of the order in which these were uploaded here the parent/child relationship list above is not in the order in which they played the games either), and I'm not sure if they announce when they beat what before posting these images.