Baccano! (バッカーノ！, Bakkāno!?) is a light novel series by Ryohgo Narita, with illustrations by Katsumi Enami. The first volume won Gold in the 9th Dengeki Novel Prize and the series has been made into a TV anime which started July 26, 2007 by Aniplex and Brains-Base. The second storyline in the series has also been adapted into a manga.
Firo Prochainezo is one of the youngest members of Manhattan's Martillo Camorra family and is a skilled fighter. He was orphaned when he was ten and picked up by the head of the Martillo family after Firo attempts to rob him. Because of this, he considers the Martillo to be his family. He is tasked with monitoring casinos to prevent cheating, and later manages those casinos after becoming an executive member of the family. In 1930, he mistakes the immortality elixir for alcohol and takes it. He later distributes the elixir at a party, becoming immortal himself. That year, he falls in love with Ennis and devours Szilard Quates, saving her and the new immortals. Despite the fact that she does reciprocate his feelings, they live together afterward and eventually marry in 2002. In 1934, he arrested by Victor Talbot for the destruction of public property during the bombing of the skyscraper Mist Wall and is imprisoned on Alcatraz Island. When Maiza Avaro leaves the Martillo in the 1970s, Firo is given the position as the family's bookkeeper until Maiza returns.During this time, Firo wears glasses in an attempt to look smarter. Because he is friends with Luck Gandor and Claire Stanfield, the Martillo and Gandor families are on friendly terms. In the series of Baccano it makes you think that Firo and Ennis would become girlfriend and boyfriend.
To tell you about Firo Lover which is Ennis. Ennis is Firo's lover.
She's the first homunculus created by Szilard, an heartless business-man that want to reach all power and informations about immortality, and for this reason he uses Ennis like a weapon, leaving to her the assassinations and the dirty jobs. But fortunely, Ennis meets Firo, the guy of her destiny, the person that saves her from a tragic death. Firo falls in love with her since the first moment, and Ennis too, but the difficult situation fetters the expound of their feelings.
In the anime they become a couple in the end of the series (last 3 episodes from DVD excepted), but in the novel they get married, even if after much years.
Ennis thoughts to doesn't have feelings but Firo proves to her that every person has an heart, an heart that can beat for another one.