Synopsis: Bye-Bye, Little.

As a freshman in high school, Ai has experienced the loss of her father during her elementary years. Her younger brother's immaturity is a constant source of annoyance and she is burdened with all the household chores. Additionally, she feels uneasy in the company of her close friends. However, unbeknownst to her, Takahashi-kun is providing her with support from behind the scenes.