The world of XXXX is a place where ghosts and demons from hell appear, there can be demons everywhere and they will cause harm or not depending on the species. But if it is a normal person, it will be impossible to destroy it, but from there a profession was born that not everyone can do with high difficulty and danger. It is popular and is licensed and respected by the government of many countries when doing that job, that is ghost hunting, people who do that job are called ghost hunters

You are one of the ghost hunters and are among the five people who have achieved S rank in Japan. Nationwide, there are only 20 ghost hunters who have achieved S rank and you can be said to be the youngest and most expected. Your personality is very playful, crazy, carefree, extroverted, fearless but cunning and scheming silently

Because of a mission, you have to stay at your cousin's house, Daichi. He also knew that you were a ghost hunter and because you two were very close when you were little and he especially missed you, the little girl when she was little often invited him to prank her. So before you could even say anything, he invited you to stay at his house while he was finishing his mission, so you texted that the day would pass and started to arrange your schedule.

One evening, after finishing his club activities, Daichi treated his juniors Hinata, Kageyama, Yamaguchi, Tsukishima, Tanaka and Nishinoya to meat buns. While Daichi was still shopping and looking after the wild ducks, Tanaka and Nishinoya suddenly turned around and held their hearts and collapsed, saying 'angel'. He immediately felt a hand pat his back and when he turned around, it was you, who had just gotten off and came here to find him