I'm Nobiko

The episodes starts at the vacant lot when Nobita loses to Gian again and he asked for another gadget that will turn him into a girl. So Doraemon pulled out, Transformation Headband, and demonstrates how it works. During the transformation, Doraemon is now turned into "Dorako", but Nobita feels disguted, which makes Doraemon instantly get mad at him and takes off the headband. Nobita asked Doraemon so he can try it on next. Without thinking twice, Doraemon gives the gadget to Nobita and puts it on. During the transformation again, Nobita is now turned into "Nobiko" and looks at her body, then Doraemon tells her that due to the effect of the gadget, everyone in the world will treat Nobiko like a girl, instead of Nobita. Then, her mother enters the room, then Nobiko goes on a shock face meaning that Tamako might scold her for dressing up like a girl, but it wasn't. Tamako only arrived at the room to give them a snack. Nobita whispered to Doraemon saying that Tamako called her Nobiko, and he replied that he needs to change his man's voice to a girly voice to make it non-suspicious and Nobita replies back in a girly way, then Doraemon sighs in embarrassment. Before they sit down in a crazy way, Nobiko sits, which angers Tamako, telling her that it's not allowed to sit criss-cross with her skirt on, and Nobiko apologizes and sits like Shizuka. After eating the snack, Nobita returns to normal by going to school and takes the Headband with him, before Doraemon goes back inside the house, he tells Nobita to return the Headband, but Nobita didn't listen and heads off to school. Doraemon turns worried if Nobita is going to be okay with Doraemon's headband with him.

The scene changes at the school building. Gian and Suneo are inside of the classroom decides to prank Nobita by putting the chalkboard eraser on top of the door. Before he goes in, he puts on the Transformation Headband and turns into a girl (without the transformation scene) and goes in. Then, the chalkboard eraser landed on Nobiko, then Gian and Suneo laughs, but the laughter stops when they thought that it was not Nobita, it was Nobiko (Nobita in disguise). Shizuka tells them that they should stop acting like a bully in front of a girl and the group of girls including Shizuka tells Nobiko if she's okay from the prank that Gian and Suneo made. Nobita says in his mind saying: "Oh, so that's how girls protect each other" and changes to his girly voice saying that she's alright from the prank and takes her glasses off. Gian saw Nobiko's eyes and starts to fall in love with her, and Suneo tells Gian what is going with him, but both of them knelled down and apologizes to Nobiko, then she realized that Gian's act was different when talking to a girl and goes to her desk.

but when arriving at the class, thinking that it was Nobita, it turned out to be Nobiko, and Giant falls in love with her without knowing the truth, he apologizes, and during the whole day he does favors, but it starts to complicate the thing when he is declared, Doraemon tried to avoid the situation, Nobita dropped the Headband and when he returned to normal, Giant became angry and chased him.