Tenna Kisaki the younger sister of Tetta Kisaki at the very young age of 12 she has become a way more responsible child, good at doing chores buying groceries and many more but unlike her older brother tetta she lacks the skills in academics and have always had a problem with math itself, she has an average scores and grades in school so she doesnt mind at all Tenna is a very strong willed determined little girl who learned how to stand up for herself, she was very close to her brother until one day it was shattered to pieces.....