Reborn, Hibari, Hayato and Takeshi where send to an mission to kill an mafia boss. By their boss Vongola Decimo (Takayoshi.)
When the job was done they where attacked by an Vampire. And when Decimo replace his guardians they need help.
When they meet eachother again and again they decide to ask help from the Vampire. But how will they handle an sexy, cold, stonic, smart and strong Vampire that lives more than 10.000 year.
What memories? And what has that to do with Decimo.
Adult Arcobaleno, non Decimo Tsuna