Romance! A crazy, overprotective brother! And...spies?!

Taiyo Asano has been on his own ever since his parents died and the only one who seems to care for him is his childhood friend and classmate, Mutsumi Yozakura. But Mutsumi has a secret—she is the head of a family of spies! And on top of that, her brother Kyoichiro is dangerously protective of her! To stop Kyoichiro from killing him, Taiyo and Mutsumi must take the ultimate leap—marriage! Because in the Yozakura family, family cannot kill family.

It’s Nanao vs. Mozu! Now that Nanao knows Mozu has the final fragment of Asa’s heart, he brings his True Spring Blooming to bear! Through this battle, Nanao discovers that Asa’s true goal has been to acquire Taiyo. Meanwhile, Taiyo approaches Asa and challenges him to a one-on-one battle!