High school student Taiyo Asano has been socially isolated ever since a tragic accident took his family, speaking only to his childhood friend, Mutsumi Yozakura. However, Mutsumi is far from an ordinary girl; she is the tenth head of the legendary Yozakura spy clan. While she possesses no combat abilities herself, she is constantly targeted by underworld threats and protected by her six incredibly powerful and eccentric siblings.
The biggest threat to Taiyo’s life isn't an enemy assassin, but Mutsumi's eldest brother, Kyoichiro. Consumed by a twisted, overprotective obsession with his sister, Kyoichiro is determined to eliminate any boy who gets too close. To save himself from Kyoichiro's wrath, Taiyo takes the ultimate drastic step: he agrees to marry Mutsumi. By becoming a member of the family, he invokes the clan's ironclad rule forbidding family members from killing one another.
Now a part of the chaotic Yozakura household, Taiyo must undergo hellish training to survive life among super-spies. From the weapon-loving Shinzo to the master of disguise Kengo, Taiyo must earn the respect of his new siblings while developing the skills to protect his bride. Mission: Yozakura Family delivers a perfect mix of heart-pounding shonen action, sweet romance, and laugh-out-loud comedy as Taiyo evolves from a timid boy into a formidable spy.
