"A source of light during the night used to be a luxury that most people couldn't afford. That's why the spirits of those who snuck into other's houses to steal oil became these Youkai, I guess. They tried so hard to act normal and unsuspicious in life that their faces ended up like that. The oil that these youkai produce can be used in lanterns or food without problems. There are rumors that they secretly make an even higher grade of oil, which people all over the country travel to obtain. Maybe I could ask one to share some with me next time?" File:Aburasamashi card.jpg