A Strange and Mystifying Story Vol. 3 (manga)

Tsumugi Shirota is your typical high school student. He’s handsome, kind, and for some strange reason, surprisingly adept at household chores. On his 16th birthday, a rather unusual but special guest comes to meet him—Master Kurayori, the guardian deity of the Shirota household. Imagine Tsumugi’s surprise when he finds out this deity is also his fiancé!