Yaichi is a work-at-home suburban dad in contemporary Tokyo; formerly married to Natsuki, father to their young daughter, Kana. Their lives suddenly change with the arrival at their doorstep of a hulking, affable Canadian named Mike Flanagan, who declares himself the widower of Yaichi's estranged gay twin, Ryoji. Mike is on a quest to explore Ryoji's past, and the family reluctantly but dutifully takes him in. What follows is an unprecedented and...