In a world where the most dangerous family is also the most secretive, Mission: Yozakura Family follows the timid high school student Taiyo Asano, whose only source of comfort is his childhood friend and classmate, Mutsumi Yozakura. Unbeknownst to Taiyo, Mutsumi is the eldest daughter of the legendary Yozakura family, a clan of superhuman spies with a dark and bloody history. When Mutsumi's overprotective and dangerously unstable brother, Kyoichiro, threatens Taiyo's life, the only way for the young man to survive is to marry into the family and become the Yozakuras' newest member. Now, Taiyo must navigate the chaos of living with a family of eccentric, world-class spies, each with their own unique and deadly skills. To protect Mutsumi and unravel the mysteries surrounding her family, the timid hero must train to become a spy himself, all while trying to keep his new in-laws from killing him. Blending high-octane espionage action with heartfelt family comedy, the series chronicles Taiyo's unlikely journey from a terrified outsider to a key player in the Yozakura family's most dangerous missions.