Mission: Yozakura Family - S01

After losing his family in a car accident, Taiyou Asano pushes away his childhood friend, Mutsumi Yozakura, but she refuses to let him go. Despite his classmates' attempts to reach out, Taiyou struggles with social isolation. One day, the vice principal summons Taiyou-only to threaten his life. A stranger rescues him, and when he wakes up, Mutsumi introduces him to her siblings: a family of spies with extraordinary abilities. Each generation, one ordinary person becomes the family head, and Mutsumi is the current heir. The family is sworn to protect her at all costs. The vice principal is revealed to be Kyoichiro Yozakura, Mutsumi's eldest brother. Convinced Taiyou endangers Mutsumi, Kyoichiro insists the only way to keep them both safe is marriage-the family's rules forbid killing within the household. Though hesitant, Taiyou agrees to protect Mutsumi and begins training as a Yozakura spy, facing constant threats to their lives.