“Sister” who likes to enter “narrow places”.

One day, when I went to my sister's room, a suitcase was left.

My brother took care of it, but there was a sister in it ...

Unable to notice that my sister is in the room, my brother locks the suitcase and puts the "suitcase with my sister" in the corner of the room ...

My sister won't go home forever.

Suddenly ... I noticed my brother, maybe that suitcase ...