Chitoses sister was formerly with Haruhiko together, but the relationship fell apart. It has now been discovered that Chitoses absence from home is due to the fact because she spends her time with Haruhiko. She asks him why about to take good care of them, because this girl needs it - the two are the most important people in their lives and in terms Haruhiko, she still harbors feelings for him, even though their relationship fell apart.