From the article:

Despite his popularity, Lee has been dogged by allegations of involvement in a financial scam, a problem that flared up just before the election when parliament agreed a special investigator should look into the securities fraud allegations.

The investigation is unlikely to be completed before Lee's inauguration on February 25 when he will become immune from prosecution, but it could undermine his authority if any link to the fraud is established.

Sound like a right-winger to me.

Nothing surprising about this if you know a bit if South Korean history. The South ha had at least 3 right-wing dictatorships and multiple army back coups. It has being relatively stable the last 2 decades, but does have its history.

What makes him a right-winger, again?