Hi there
Just checked your nesffice.co.kr in MOZ and saw that you could use an authority boost.
With our service you will get a guaranteed Domain Authority score within just 3 months time. This will increase the organic visibility and strengthen your website authority, thus getting it stronger against G updates as well.
For more information, please check our offers
https://www.monkeydigital.co/domain-authority-plan/
NEW: Semrush DA is now possible
https://www.monkeydigital.co/semrush-da/
Thanks and regards
Mike Salisburry