Reborn goes to Japan to begin tutoring Tsunayoshi "Tsuna" Sawada, a no-good loser, who has a crush on Kyoko Sasagawa. When Reborn arrives, he tells Tsuna that he is going to train him to be a Mafia boss, under commend of the Ninth Vongola Guardian. The next day, Reborn shoots Tsuna with the Dying Will Bullet, and causes Tsuna to embarrassingly confess his love for Kyoko, however gets rejected. The next day, Mochida of the Kendo club challenges Tsuna with the winner having Kyoko. Under the Dying Will Mode, Tsuna wins and becomes popular.
In order of appearances, doesn't contained unnamed minor characters.