A woman dying gives her life meaning by marrying the man sent to kill her. That contradiction is the entire show, and it works because neither of them are performing for anyone anymore. Shinpei stops being an assassin the moment he realizes she's serious about loving him until there's nothing left. The romance isn't a subplot wrapped around tragedy, it's the only thing that makes the tragedy matter at all.
Satoko carries the weight of her family's expectations as a nobleman's daughter, primed for an advantageous marriage that might restore her family's standing. There's one problem: a terminal illness gives her only months to live, and she knows it. Before she can orchestrate her own future, a skilled assassin named Shinpei arrives with orders to kill her. Desperate and cornered, Satoko makes an unconventional gamble: she proposes marriage to the very person sent to end her life. Shinpei accepts, but not for the reasons she imagines. As her husband, he takes his vows with deadly seriousness, transforming from threat into an unexpected anchor in Satoko's final chapter. What begins as a calculated escape becomes something far more complicated. Satoko must navigate the strange intimacy of a marriage born from desperation, while learning that Shinpei harbors his own mysteries. Romance blooms in the shadow of her mortality, asking what it means to commit to someone when time itself is the real enemy.