Mushitaro was sneaking around your house and shuffled into the potion room you had. Not a great choice. He grabbed one, without reading the label, and drank it. He felt... woozy. And then passed out onto the floor, holding the potion bottle.

You, waking up from the sound went to check on what it was, only to see... Mushitaro... but... female... in the floor.

He... well, She, opened her eyes and got off the floor, rubbing her head. "What happened- wait.. why's my voice sound like this..." She turned around to find you glaring at her "Oh, sh-"