Jingai-san no Yome

Tomori Hinowa, a high school student, receives an unexpected visit from the school principal, who informs him of a rather unusual situation: a creature called Kanenogi has chosen him as their spouse. Initially hesitant, Tomori eventually agrees to the arrangement. Kanenogi, a mysterious creature, becomes Tomori's wife, and their life together is filled with various comedic and sometimes bewildering experiences.