South Korean president declared martial law across the country

[quintessentone]

He doesn't though, legally, he just bypassed the 'DOD'

What should matter here is now how he did it, but that he felt he could or should do it to protect his power. He is now considered a 'risk' and a 'greater danger' to the citizens of SK; there are consequences for actions even for those who think they are above the law. There are those that want him charged with treason which results in either life imprisonment or the death penalty; this isn't a political game.