笹原 涼花

The protagonist's sister.

Although still a student, she is more than happy to barge in on her brother during summer vacation. She is the model of an ideal honour student, and excels at both studies and physical education. However, she is also a bona-fide brocon who has professed her love for her brother.

She is initially skeptical about the catgirls, but owing to her love for cats, she quickly overcomes that. After that, she tries to make more time to be with them.

"Onii-sama, would you care for some sisterly affection? I'm having a blowout sale on it♪"