Anohana: The Flower We Saw That Day(2011)

Jinta Yadomi and a group of her childhood friends were separated from each other one day in a heartbreaking incident, and now after passing away in their high school, a sudden event made them face their sins and what happened that day and face the consequences of their passing. For a few years, she has to deal with the guilt left by her passing, and for this, she has to deal with strange forces and ghosts.