Malevolent Spirits: Mononogatari manga volume 5 features story and art by Onigunsou.

When Hyoma learns an unsettling new piece of information about Botan, he decides to take a much-needed break from the Nagatsuki household. Unsettled herself, and reeling from Hyoma’s absence, Botan takes matters into her own hands and vows to learn more about her past and her own abilities. Since her family will sugarcoat the truth, she instead pays a visit to the head of the Kadomori Saenome. Will he give her the answers she seeks? Or is Botan, separated from all those who protect her, putting herself in a dangerous situation?