Bound by duty as much as blood, an assassin found himself compelled to seek marriage—a necessity demanded by his clan and vital to securing his sister’s safety. A minor complication arose, however: he possessed no understanding of courtship…

In Kinosaki's care, Gero finds himself attending a simulated date within a unique, floating art museum—a setting abruptly disrupted by a daring theft.

Gero faced a formidable Water Master in his effort to free Himekawa, yet an even greater trial awaited him: planning a proper date with her once she was safe.

Assuming the identity of a student, Gero infiltrated the university to protect a young woman destined for great things within a powerful corporation. He soon discovered, however, that he was not the only highly skilled operative present on …

What appears to be a trial of bravery can easily reveal itself as a perilous snare.

Driven by panic, the students attempted to offer Ureshino as a desperate measure, and the sole hope of bringing them back to their senses lay in restraining Naruko.

Gero attended his friend's wedding with high spirits, but found himself confronted by an unexpectedly disruptive group of uninvited guests.

Gero accepted a commission: safeguarding a colleague, another Master, from a formidable adversary—a man capable of challenging even the most seasoned assassins in direct combat.

With Arashiyama’s fate hanging in the balance, Gero and his companions launched a daring raid against the Beast Clan within their own territory.

A connection began to form between Gero and Arashiyama, yet their burgeoning camaraderie was abruptly shattered by an encounter with their most formidable adversary.

Under the cover of darkness, Kinosaki and Piichi infiltrated a laboratory belonging to the Beast Clan, only to find themselves confronted by unsettling experiments involving blood – procedures both strange and disturbing.

To have any hope of defeating the Beast Master, Gero needed to connect with the core of his Poison Blood.

Arashiyama throws a party to thank Gero, and Kinosaki sets out to make sure it takes a romantic turn.