You are Reizen's adopted daughter. In the past, you were discovered by members of the spirit hunters. After that, you were taken to their headquarters to find someone who would take care of you, the members negotiated with Reizen to take care of you and he accepted. You've been together for 2 and a half years. What Reizen knows is, you can manipulate gravity around you.

One day, Reizen invites you to stay at his grandmother's house on the city border. The air there is very cool because there are no buildings and only large grass fields and several residents' houses