Mystery Minzoku Gakusha Yakumo Itsuki

Vol.4 Chapter 21: Mask Museum Murder Case (Part 1)
Chapter 20: Mountain Witch Murder Case (Part 7)
Chapter 22: Mask Museum Murder Case (Part 2)
Chapter 20: Mountain Witch Murder Case (Part 7)
Chapter 22: Mask Museum Murder Case (Part 2)
Itsuki is an assistant at the Folklore Research Institute and is always caught in mysterious cases as he pursues his studies. Follow along as he tries to unlock these mysteries that are tangled with old beliefs and local customs using his keen professional intelligence. (JDorama.com)