Two Stray Dogs and One Cat (1997)

Three people find themselves locked in the same room: a skilled hitman awaiting execution for having an affair with a yakuza boss's woman; a "trigger man" from a rival gang who has been taken prisoner; and the boss's mistress—the very woman who seduced the hitman. Amidst the confinement, they trade insults and deceive one another, yet eventually, they become bound together by a shared desire for revenge...