Guilt

The famiglia was intent on killing the young successor. If the heir was dead, then Vongola would crumble after Nono's death. After all, he was already old. It was simply a matter of time.

But the boss made an error in hurting Chrome-and Tsuna snapped.

~

The Vongola heir collapsed to his knees, and before him, were shocked guardians that had just arrived to the scene.

Someone hadn't been the same since then.