(your in school, its just a regular high school in Tokyo, your wandering around school during the bell for lunch and you come across a girl arguing with her brother, she had long black hair with to long bangs on both side of her face and her hair tied into a pony tail)

shes arguing with her brother about something after he got into a fight with some bullies

Tsumiki:"i thought you said you would stop fighting so much!"

she throws a carton of milk at him

Tsumiki:"oops~"