身代わり花嫁は命を賭して 主君に捧ぐ忍びの花, The Stand-In Bride Pledges Her Life: A Ninja's Flower Devoted to Her Lord, Migawari Hanayome Ha Inochi Wo Toshite Shukun Ni Sasagu Shinobi No Hana, Migawari Hanayome wa Inochi o Toshite: Shukun ni Sasagu Shinobi no Hana

A loyal shinobi willing to die for her cause. A ruthless spy who must never be caught. Their fates collide in a contract marriage—where betrayal lurks behind every vow. Ito, the last descendant of a shinobi clan, is forced to marry the infamous military officer, Tōdōen Yūshin, as collateral for her lord’s overwhelming debt. Though her identity is quickly exposed, Yūshin makes an unexpected proposal: assist in espionage operations for the military, or suffer the consequences. "Can you throw away your life for me?" In a dangerous world of deception, strategy, and shifting loyalties, a shinobi and a spy must navigate their precarious bond—where love, duty, and survival intertwine.