" ( 約束の手作りケーキ ). The string "def9fd1d" is likely a file hash used by release groups like "hikouninraws" to verify the integrity of the high-quality raw video file. Overview of Episode 13: "Promised Homemade Cake"
: Debuted as a power-up born from Shoma's "precious homemade cake". hikouninraws kamen rider gavv 13 def9fd1d best
: Shoma is inspired by Sachika's Bûche de Noël to bake his first cake. This act is deeply personal, as he recalls being excluded from cake celebrations by his siblings in the Granute world. " ( 約束の手作りケーキ )