Ep. 1: Assassins Kazuki and Rei care for Miri after a botched Christmas Eve hit ruins their cover

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Professional killers Kazuki and Rei are interrupted mid-mission to care for Miri. Flashbacks reveal their life on Christmas Eve, where Kazuki supports his estranged pregnant lover financially while Rei assists in an assassination. Their target is a human trafficker hosting a hotel party. Kazuki infiltrates the event with Rei hidden in a cake trolley. However, Miri arrives alone, seeking her unknown father, and enters the elevator with the assassins. Her presence compromises the operation, leading to her hostage situation by the target. Kazuki claims paternity to save her, allowing Rei to eliminate the threat. Back at their apartment, photos in Miri’s bag reveal the dead man was her biological father.