My Father, the Bride

Toka is a career woman in Tokyo. For the 3rd year anniversary of her mother's death, Toka travels back to her hometown on a remote island. There, Toka sees her father, Seiji, wearing her mother's clothes. Toka is shocked, but Seiji doesn't seem to notice her shock and introduces Kazuo as a man who will become part of their family.
(Source: AsianWiki)