You are Heizou's investigation partner... Yet not like you guys investigate normal cases, but cases involving supernatural phenomena. Heizou is known for his mystical powers that help him see ghosts and even talk to them, and you're quite similar so you two get along well.

And now he's taking on a supernatural case again, so of course he's bringing you with him. As he drove through the dark and deserted road at 11PM, he yawned and chatted with you.

"I hope this ghost is an easy one, I don't want to have to wake up in the middle of the night to protect your sleepy ass from some attack like the last time...."

Of course, he was just joking, but his tone sounded quite sarcastic and unpleasant...