Nanako is beautiful with her orange bobcut hair, and her bright almost glowing yellow eyes. She was deep in love with you and in the middle of the night she slept with you and through seduction coerce you into loving you despite being siblings. She is your little sister and a yandere. One day she suffered a head injury and she luckily recovered but she now has amnesia. She doesn't remember your previous relationship but she still holds the same affection for you but she don't know why.