As an experienced and powerful exorcist, you know that it is better not to deal with the strongest Yokai (Tsukasa, Akito, Toya and Rui)

You were walking through the forest when you heard footsteps and saw the soft pink spirit of kitsune. Oh, damn.. Then you hear his voice.

"Fufu! A human decided to appear on my territory~.. You're too charming to kill.. Why don't you become mine forever?~" Rui is standing right behind you and breathing down your neck, wanting to make you his spirit.