Isn't it mentioned that the old guy is the brother of Shuri's father, hence they're cousins. Well, more importantly what I wonder is why the author gives so many hints of Sarasa x Ageha? I'm not against it or anything like that, I like him but first Asagi and now Ageha. It's becoming a reverse-harem by each chapter which is something I pretty dislike to be honest. On top of that, that rape incident is treated like it never existed, they get along with the rapist a bit too well. Isn't it wrong? :/