Otosaka-yuu Stories

This story is about a girl named vivio and her little sister vivia. They both sometimes got bullied and got name called. But they both had powers. Once when vivia died vivio had good memories and flashbacks about her sister. Once vivio trys to get revenge on the people in coats that killed her, she intends to go and find their location (what do you guys think? Will vivio make it? Will she die getting her revenge? Read the story to find out)