Alya Sometimes Hides Her Feelings In Russian Light Novel vol 9 back

Welcome to the Suou household--where everyone is a devoted fan of the little sister of the family! At a park in the dark of night, Masachika finally revealed to Alya that Yuki is his sister. Alya can't stand to watch Masachika beat himself up for abandoning his younger sibling, so she takes him by the hand and they go visit Yuki, who has fallen ill. There Masachika will finally confront his mother and grandfather, moving forward despite his doubts. And Alisa, now fully informed, really communicates with Yuki for what feels like the first time. Affection, determination, and love collide!