Jingai-san no Yome

High schooler Tomari Hinowa is called to the principal's office one day to hear some shocking news: he's getting married! A mysterious fluffy creature called Kanenogi has chosen him as their wife, and despite Tomari's initial misgivings, he decides to accept. What follows are a series of delightful tales from this new couple's monstrous married life. Source MyAnimeList