Alternate Universe | I-land

A normal high school student, Sayuri Riho had many close friends that were a part of the Cultural Anthropology Club. In an upcoming cultural festival at her school, she and the members get too curious, falling into the killer's trap. When the school gets mysteriously locked, everyone dies within, but just before she dies she makes a wish for everything to never have happened in the first place. Her wish comes true, but there was a catch no one would remember her, only she would remember them. She fears she would reveal their past if she ever got close to them again, so she keeps her distance. Regardless, she happens to meet everyone again, this couldn't be a coincidence, could it?