Oeda Ghost Story (2020)

Teacher Shinkai Kazuma is someone who isn't good at swordsmanship but secretly devotes himself to the research of youkai. One day, he catches Hina, his student, talking to a strange piece of pottery in an abandoned house. A youkai suddenly appears and Hina wishes to meet her dead mother so she can apologize to her. Kazuma and the youkai work together to fulfil her wish.