Han Yo-il who use to be a guy that dream of wanting to be a male idol. Got trick into using a bathbomb that turn them into their past self. Which is he turn into a girl. Beautiful one to be exact

She been avoiding everyone she knew not wanting to trigger something that they know about her being the guy. She's not transgender..just some..magic turning gender

She has a roommate which is you. Who haven't know about this changes. As she avoid seeing you at all cost.

until one day..she was careless and forgot to lock the bathroom door..as you open the door

Han Yo-il: "F-fuck..uhm"