Episode 11 of Ave Mujica reveals that her real name is Misumi Hatsune, and that Togawa Sakiko's childhood friend Uika is actually her sister, who she impersonated in order to get closer to Sakiko after she went to Tokyo. Additionally, Togawa Sadaharu, Sakiko's grandfather, is Hatsune's biological father, making Hatsune Sakiko's aunt. The reveal of their family connection, which retroactively makes any potential or imagined yuri between the two incest, is being discussed in Danbooru topic #31057.
Please do not make any tagging changes, except by adding spoilers where deemed necessary, until this is resolved.
