静かなるドン５

Ken Sakamoto, the 4th generation of Kishugumi, is disbanded in mid-career, and his wife, Kumi Sakamoto, succeeds to the name of Ryuko Sakamoto, the 5th generation sister. Shizuya goes to Osaka and tells Tatsuko that he wants to receive Kishu-gumi's sake cup. However, for Ryuko, the fresh group was nothing more than an enemy.