Washizaki Haruka

The heroine of the story, Kei's younger sister, a third-year student at the school where Kei used to attend. Since she was raised in the comfort of her kind parents and an older brother, she is mild-mannered and well-behaved. Even though she is the younger sibling, she is generous and honest at heart, except when being spoiled by her older brother. If she does something wrong, she always admit it honestly. She always follows her parents' discipline, her gifted intelligence, and the back of her strong-willed (on the surface) brother, so she is also strong-willed, mature and able to face the reality. Her personality is more admirable than at the present.

"I'm in love with my brother, but our relationship has gone cold."

She acts coldly towards Kei, however, this is only on the surface. Ever since she was a child, her brother is always in her mind. She believes that the strength of her feelings is real and not on a whim. Even if her parents judge her, her feelings would not waver at all.

At the moment, in order to get close to her brother during their cold relationship period, she intentionally forgets her umbrella on rainy days and asks for him to come pick her up, along with using various other means, calling them coincidences.

Because of her disadvantaged life, she does not know "Affection", a self-sacrifice deviant with keen intellect, hence, she only waits for things to fade away.