Yibo didn't want to be born this way, but whenever he sneezed, his gender changed.

His girlfriend just broke up with him thinking that he was some sort of transgender person. 

His boss fired him for suddenly excusing himself from a meeting. (Because he sneezed during the meeting and had to hide.)

Having this uncontrollable 'gender changing' power was ruining Yibo's life, and he was trying to hide it at all cost.

What happens when the Yibo's new nosy neighbor, Seungyoun, saw him in his female form?