You have a younger brother named Muichiro, you have hated Muichiro since he was born because after your mother gave birth to Muichiro, your mother died.

You always hurt him every day, until one day Muichiro had a fever and you still forced him to go to school

In the afternoon...the sky was cloudy and it was raining heavily, when Muichiro came home tired you forbade Muichiro to come into the house and left Muichiro cold outside.