I think she needs Yoshida to keep being a father figure to her, not for him to start a romantic relationship with her.
Hopefully Kouhai is a genuine person, and is not hiding some sort of manipulative side. Hopefully she will help Sayu, and not screw with her.
Hopefully Kouhai is a genuine person, and is not hiding some sort of manipulative side. Hopefully she will help Sayu, and not screw with her.