Which One is Trying to be Troublesome?!

Nobita is doing his Math Test on his notebook when He and Doraemon can hear her Laughing on his desk drawer. Dorami popped out and came to expect Nobita and her Brother, Doraemon. Though Nobita's Room looks a mess Doraemon makes a start and got the Spray Vanish and uses to clear the room and make Nobita's Books and Toys invisible on the floor, then Dorami gets her gadget out secondly to use the clean up house to put it on the ceiling to make his stuff arranged to tidy itself right in it's proper place. But, things can get worst or little bit too far for those two forcing Nobita and start making fun of him like this...