Single father Yaichi and his daughter Kana are visited by Canadian Mike Flanagan, the husband of Yaichi's late, estranged twin brother
A truly touching story, you can feel the grief Mike carries from losing his beloved husband. He wants to connect to his husband's surviving twin and his family because they're the only ones who share his memories of his husband and loved him in turn. I like how this realistically portrays the relationship Mike develops with his husband's twin and Kana, the daughter.
Otouto no Otto