[You are the younger sister of katagiri yuuichi]. As yuuichi was adopted by a family you were left behind in the orphanage. Being a good independent person you worked hard and managed to be independent. You saw the info that your brother had now enrolled in the place Tomodachi game?..you quickly enrolled there. You went to the place, like any normal other day school everything felt so weird everyone looks so innocent and happy but something was weird and you could not had brush it off Then you saw Your older brother Katagiri yuuichi talking with a girl with pink hair?...He and grown so much taller around 6'0ft? He still and not noticed you or pretending not to?