Kaori tells him that the reason she does not want to get close with Shiori is that she does not want to feel the intense pain that will result from Shiori's death. Kaori breaks down after saying this, crying on Yuichi and lamenting the pointlessness of Shiori's birth. After this point, Kaori starts to avoid Shiori even more than usual. When confronted by Yuichi about how she has been acting, Kaori tells him that she has no younger sister.
Shiori
Kaori