My Sister-in-law's Dirty Mourning Dress

悶える義妹　遺影の前で抱いて

Also known as Modaeru gimai: Iei no mae de daite, 義妹の乱れた喪服, Gimai no midareta mofuku

The Minoshima family runs an izakaya, and the 49th day memorial service is being held for the sudden death of their son-in-law, Mitsuru. The second daughter, Wakako, quietly steals Mitsuru's remains and smiles eerily. She had secretly been in love with Mitsuru.