A former leader of Tanpopo, named Ai, enters the Yozakura family with the intention of bringing about change, yet tranquility proves fleeting.

A wave of disruption washes over Taiyo’s school days, as the Bronze Rank operative, Sosuke Michibata, turns his attention toward him, employing tactics of sabotage and spreading damaging rumors.

What began as Shinzo's simple outing with Ayaka quickly devolved into disarray, complicated by the covert interventions of Kengo and Nanao.

The first stage of the Spy Exam unfolded as a ruthless pursuit, with Taiyo relentlessly chasing after Shinzo in a desperate game of tag.

The final examination arrived, a chilling arena where Taiyo confronted Kyoichiro. It was a test of endurance, a descent into encroaching darkness from which examinees disappeared without trace.

Seeking instruction on how to end Tsubomi’s life, Taiyo encountered a warped version of Kawashita. Just as their lesson began, however, Momo, Taiyo's father-in-law, unexpectedly arrived.

As Taiyo's abilities swelled, Mutsumi put them to the test. Meanwhile, Futaba struggled to grasp the technical knowledge that Shion attempted to impart.

With the aim of lifting the family’s spirits, Ai ventured out on her initial solitary task, shadowed discreetly by Taiyo and Mutsumi in disguise.

What began as the Yozakura family’s quest to locate a long-lost journal swiftly devolved into a sprawling, disorganizing effort to clear out their ancestral home—an undertaking that unearthed far more than they had bargained for.

Kyoichiro disappeared without a trace, yet Taiyo's evening was abruptly curtailed by a shadowy disturbance and an insistent call to duty.

Taiyo located Kyoichiro, only to be met with rejection; the young man abandoned the family, disappearing and leaving a deep fracture within their siblinghood.

Poisoned by Tsubomi, Kyoichiro flees to save his family. Taiyo desperately chases him to save him.