Son Eun of "WANNA ONE Go" appearance, "lessons of improper use" is the subject.

* 2-pack set of new mask pack. The upper one is OK.

* A mistake that the hole that should be applied to the mouth was applied to the nose instead. Dyspnea. .

* Noticed in the instruction manual, apply the hole to the mouth, but applied upside-down closing the nose. Respiratory failure. .

* Turned into the villain of "Harry Potter Lord Voldemort". .