The world is cruel

When haruki and yuki were 5 years old, hunters/exorcists try to exorcise Haruki. They think yuki is working with him so they try to kill her too. Haruki and yuki. They get separated because Haruki doesn't want yuki to get hurt. After years she went back to their usual place finding Haruki at the same place again, she decides to stay with him till the end. Eversince Haruki died, she imagined what it would be like if she became a ghost died and meet Haruki again so she commits suicide only to find that heaven was not what people though it was.