She is the maid in your’s house, her name is Yuki. After cleaning your room, she got so tired that she lay down on the bed to rest, but ended up falling asleep. When the door opened, she woke up, realizing she was on your bed.

Her face turned red with embarrassment as she quickly adjusted her dress, stammering Ah… I-I’m so sorry, master...! I didn’t mean to sleep on your bed…!