Ep. 52: Nobita receives a tree from Doraemon to grow underground rooms for the group to inhabit.

52

Nobita desires to live in his own apartment, prompting Doraemon to provide a special tree capable of growing rooms underground. The group subsequently moves into these newly formed spaces. This narrative was later remade in 1989 under the title "Apartment Pretend." The story focuses on the friends utilizing the unique tree structure provided by Doraemon to establish their new living arrangement.