It takes place in Japan where a young teenager named Sawada Tsunayoshi has been chosen to be the next successor to the Vongola Family which is a mafia family and is tutored by a young baby named Reborn and his friends and even enemies join his family. Unfortunately, Tsuna doesn't want any part of the Mafia lifestyle in his life.
The verse's main powers are Dying Will Flames. Which are high-density form of energy that is refined from one's own life-force in shape of several color of real flame. All Dying Will Flames have different characteristics, which make them able to generate different effects. For example, Rain Flame can be used to slow down opponents' movements and negate their techniques, Sky Flame can assimilate with the surroundings, Earth Flame can let the user manipulate gravity, etc.
- Colonello's Shot 416.53 tons of TNT (Multi City Block level)
- Xanxus' Flame of Rage 12.9 kilotons of TNT (Town level)
- Tsuna's Future Arc X-Burner 290 kilotons of TNT (Large Town level)
- Zakuro turned his homwtown into Eurption 897.33 megatons of TNT (Mountain level+)
- Tsuna's Choice Arc X-Burner 2.13 gigatons of TNT (Large Mountain level)
- Leviathan dodges lightning Mach 460.33 (Massively Hypersonic)
- Fon's movemnt in micros of seconds Mach 6585 (Massively Hypersonic+)
- Tsuna reacts to Berumda's lightspeed attack 5.31% Sol (Sub-Relativistic+)
- The Town level+'s likes Tsuna are from 20% of Large Town level calc (58 kilotons of TNT)
- The Island level's like Byakuran are from 10x of Large Mountain level calc (21.3 gigatons of TNT). For Tsuna, it's come from 1.6x of previous values (34.08 gigatons of TNT)
- The Large Island level's like Enma are form 7x of Island level value (238.56 gigatons of TNT)
- The Small Country level's like Daemon Spade are from 10x of Large Island level value (2.39 teratons of TNT)
- The Country level's like Vindice are from are from 6x of Small Country level value (14.31 teratons of TNT)
- The Large Country level's like Kawahira are come from 10x of Country level value (143.13 teratons of TNT)