Description

A 3rd year at Shirogane Private School. Condescending and cold, people around her try to keep some distance.

She's smart, and is working as a secretary in the student council, so she's not exactly unpopular. Treats her little brother Kei harshly, that even his classmates feel sympathy for him. She beats him and even orders him to buy sanitary napkins for her late at night.

Both parents aren't home, and thus all house chores are pushed to Kei. One day, Rei who was utterly treating Kei like her toy, was unintentionally opposed by Kei and wet herself as a result, thus revealing a bit of her masochist side. On the contrary, Kei awakened a little of his sadist personality, and started "training" his sister by making her pee in public.

[Translated from Getchu]