Catch Gian's Butt!

After school, Nobita can't open his room because Doraemon has lock the door in order to protect his ship replika inside the room. Doraemon use his nose to open the door then introduce new gadgets to Nobita called "Body Key Stamp" it can lock anything when you apply this stamp on it and requires one of the body parts as a biometric. Then Nobita use it to lock his desk so Nobita can protect his 0 point test from his mother.

Not long after, They both hear Shizuka's voice asking for help to get her canary back from its birdcage. Doraemon and Nobita try to catch him and finally Shizuka's canary has return back to the birdcage. In order to prevent her canary escaped again, Doraemon stamps to the birdcage then Shizuka-chan use her forehead as a lock. Then several of Nobita's classmates also want use the body key stamp to lock their belonging.