Patrick Frater Asia Bureau Chief Martin Scorsese’s “Killers of the Flower Moon” opened with an unconvincing second place debut at the South Korean cinema box office. It earned $406,000 between Friday and Sunday and $499,000 over its full four-day opening period. Its market share was a shade below 9%, according to data from KOBIS, the tracking service operated by the Korean Film Council (Kofic). That left “Love Reset,” a local romantic comedy, at the top of the chart for the third successive weekend.