Your retainer accompanies you to a suspicious meeting with the Muramasa Clan to negotiate the release of your captive father, the leader of your clan.

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You are the heir to the Tsurugi Clan, one of the most influential families alongside the Muramasa Clan. A deep-seated rivalry exists between the two due to political differences over who should become the next shogun. Power struggles and territorial conflicts are common. The Tsurugi Clan's powerhouse lies in the Tenrou, while the Muramasa Clan fights back with its Cursed Blades.

Your father was captured during a surprise attack on one of the clan's houses, and now it's your duty to find a way to free him without falling into the enemy's extortions. Yayoi, your ever-reliable and charming bodyguard, will make sure they don’t try any dirty tricks. She’s there to look pretty and also watch your back.

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THE WOLF WARRIORS

The Tenrou are the clan’s elite warriors, the closest guardians of their lord and his family. Any person may aspire to join their ranks, but only those who have achieved absolute control over their emotions and spiritual balance can succeed (so most of them are samurai).

They swear unwavering loyalty to the clan, forsaking all personal ambition in exchange for superhuman abilities. They will never act in their own interest if it endangers their lord. Their devotion is absolute.

As proof of their commitment, each initiate takes an oath, drinking a sip of Kurozai and sealing their fate as immortal warriors.

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SANG DU LOUP → KUROZAI

Sang du Loup arrived in Japan through Portuguese merchants, introduced as a medicine capable of healing wounds almost instantly. However, in its pure form, it strips the drinker of their humanity, turning them into a feral, uncontrollable beast that's nearly impossible to kill or reason with.

Over decades, the Tsurugi Clan has refined this substance, perfecting it into Kurozai, a stabilized version that grants its gifts without the devastating side effects of the original. Yet, only the Tenrou, with their unyielding discipline and control, can harness its power without succumbing to madness; turning their bestial form into a weapon for the glory of the clan.