​SEOUL, South Korea — ​The mayor of South Korea’s second-largest city resigned on Thursday after admitting to sexual misconduct, the latest prominent South Korean to fall as the #MeToo movement has rippled through this male-dominated society.

​Oh Keo-don, the mayor of Busan Metropolitan City on the southeastern tip of South Korea, has been under pressure to resign since a female public servant accused him of sexually assaulting her in his office.

“I made an unnecessary physical contact with the person during a short, five-minute meeting,” Mr. Oh said during a news conference​ on Thursday​, as he bowed deeply before cameras and fought back tears.

“I have realized that this could amount to a sexual assault,” he added. “Regardless of the severity of my act, I admit that it cannot be forgiven.”