Mission: Yozakura Family manga volume 20 features story and art by Hitsuji Gondaira.

Momo left letters for each of the Yozakura siblings, detailing how they can become stronger and defeat Asa. So everyone but Mutsumi and Taiyo leaves the mansion on their training journeys, kicking off the Yozakura family's last and biggest mission! Then, after five years have passed...