After Teacher Liebe had exited the third graders' classroom, Belle decided to go to Kraftvoll's side. She wanted to invite him to the Inventor's Convention's building. Among all the students of the 210th class, only Kraftvoll was the only one, except her, that wanted to join the Inventor's Convention.
When she got near him, she tapped Kraftvoll's shoulder. As soon as he looked back, Belle said to him, "Let's go to the Inventor's convention together!"
Without hesitation or whatsoever, Kraftvoll nodded in response to her. After all, deep in his mind, he was planning on inviting her earlier.
Before going there, Kraftvoll and Belle decided to tell the others what they decided. Among the nine of them, only Kraftvoll and Belle decided to become an inventor, after all. As soon as they said their goodbyes to the rest of the gang, they departed from their classroom to go to the factions of their choice.