-"Gyaru activities" have more time allocated to them than "otaku activities", Mimiru confirmed gyaru who acts like an otaku instead of an otaku who acts like a gyaru.
-"Play" is not included in "gyaru activities" nor "otaku activities". Gyaru+otaku activities confirmed as SERIOUS BUSINESS.
-"Sleep" takes up about 1/8 of the schedule (maybe a little bit more). So if we assume the pie chart summarizes 24 hours of activities and that "sleep" represents "regular nighttime sleep" not "extra sleep", that would mean she only sleeps 3-4 hours a day. No wonder she can achieve more gyaru+otaku+play time than school time.