Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
At first I was a friend of my sister's. But now I can't stay like that anymore, Rin Mamiya. My sister's friend, a daughter who often comes to my house. At first it was just that kind of relationship -- watching her study, going to the same school, going home together, and gradually becoming unable to stay as a friend of my sister's.