A new transfer student from Italy, Hayato Gokudera, is introduced to Tsuna’s class. As the girls’ express their interest, Gokudera goes over to Tsuna’s desk and kicks it. After class, Tsuna is thinking about Gokudera’s actions, thinking that he can’t get along with him. He accidentally bumps three seniors and runs for it before he gets beaten.
He meets up again with Gokudera who reveals his awareness of the Vongola Famiglia and tells Tsuna that he deserves to be the 10th boss. Tsuna is confused and is surprised to see Gokudera light some dynamites and throws it at him. However, Reborn arrives and stops the dynamites from exploding. Reborn and Gokudera introduces themselves to each other and Reborn tells Gokudera that if he kills Tsuna, he can be a Vongola Decimo candidate.
Tsuna, thinking that Reborn betrayed him, tries to run for it, but Gokudera easily catches up to him and lights up more dynamites. Tsuna is able to dodge the dynamites until he ends up cornered. Reborn shoots Tsuna with one of his Dying Will Bullet and Tsuna is reborn with the dying will to defuse all the dynamite sticks. Gokudera tries to throw more dynamite but Tsuna was able to defuse them all. Angered, Gokudera tries to use three times the number of dynamites but accidentally drops them. Gokudera, thinking that he is going to die, is surprised to see Tsuna defuse all the dynamites. Gokudera immediately apologizes, saying that he’ll follow Tsuna’s commands, and forces Tsuna to make himself his subordinate.
Suddenly, the three seniors that Tsuna bumped into earlier arrive and get ready to beat them up. However, Tsuna’s first family member lights up his dynamites again and gets ready to defend Tsuna.
*Note: Bold + Italicized = First Appearance