Blue Moon (2001)

Senior Inspector Kit and his policewoman Mun work at the same police station. Behind their backs, Kit's wife is having an affair with Mun's long-time boyfriend. When the truth is uncovered, the two find comfort in each other and soon love blossoms. Elsewhere on the force, Hung a divorced CID officer is mistakenly accused of abusing his daughter ... but fate brings him into the life of Inspector Gigi. And Sam, another respected officer at the station, has the hots for Man, the traffic warden of his dreams.

Unfortunately the movie Blue Moon is not yet available on HBO Max.