Yoshiteru has planned the ultimate revenge against her former classmate Yagyuu Sekishuusai.  But Sekishuusai seems to be one step ahead, until Nobunaga appears.
Since you prepared these cake slices,
ya que los pasteles fueron 
preparados por ustedes.
ya que los pasteles los habéis preparado vosotras.
Já que você que preparou esses bolos,