S1·E23 The Better Man

Despite Atsu-hime's persuasion to name Yoshinobu successor, Iesada disagreed saying it was nonsense to recommend someone she had never met. Atsu-hime invites Yoshinobu and Tokugawa Yoshitomi, another candidate from the Kishu-Tokugawa family, to the castle to see them face to face. While Yoshinobu disappoints her, Atsu-hime was fascinated by Yoshitomi to whom laced snack was served.