The scene begins with an adult man, short black hair, Rougé jacket and long white pants. In a computer office in Montreal. several employees were working on software for the company.

{Let me introduce myself, my name is [Y / n] 27 years old. Single and otaku. I work for a high-tech company called 010 Vît Alone. Every day is always the same.} Y/N thought.

He's in the office, working on a new news game program for the high-tech company.

"Here!" He finishes to put the new program in the computer.

"Y / n your program is really great. You will definitely get a promotion. " His friend Luke told him. "We're going to celebrate."

Luke gives it as a meeting point in front of the bank of the city of Montreal.

As expected, Y / n sees him but he didn't expect he would have brought someone.

"Y / n, this is my new girlfriend, Margaret."

"Nice to meet you…" he said sarcastically.

(Asshole, said rather it is to rekindle the knife to say I'm single…) He finds that really insulting.

"Enchant, Y / n." She shakes his hand.

"I knew you were going to hear well. Let's go eat."

The three make their way to the restaurant but the group sees a man running with a bag full of money and a knife in hand.

"Get out of here, you moron!" The thief goes to stab Luke but Y / n steps in front and gets stabbed in the heart.

The wound weakens him, collapses to the ground and loses a lot of blood.

"Y / n for you always think of the other before thinking of yourself? "His friend is raining.

"Because compared to me… you have someone to share your life with…"

"But you too could have been."

Y / n smiles and spits blood out of her mouth to the ground.

"Luke promises me one thing, go to my property, throw my computer and CDs in the river. Please."

"I promise…" The man lost consciousness. He couldn't hear the rest of the sentence.

Here I am… I've never known love, having a family, being successful in the business… I wanted to be born into a different life.}

? : Do you want to have a news life? I can help you, Y / n.

"Who said that?" The man is teleported into a white room and in front of him, god.

"Fuck god, you are god."

"Right Y / n. I brought you here so I could make your wish come true."

"Does that mean I have a better life than the one I had before I died?"

"That is to say. Depends on which wheel of reincarnation chooses. "

A wheel that has written several reincarnation lives is in front of him.

"I want a manga-style life where all the girls fall in love with the main character."

"They all want the same thing. "God is not surprised.

The man with the black hair spins the roulette wheel.

"Manga harem! Manga harem! Manga harem! "

The wheel will stop towards harem but Helluva Boss is selected.

"# $ %% &% $ # ! What is Helluva Boss? "

He disappears in a blinding light ...

At the same time in hell. Blitzo was walking around when suddenly he heard meows. He goes to the source and finds a young hellcat kitten in a box that wrote: Adopted me.

Blitzo picks up the kitten and brings it home.

"Poor kitten, from today you will be Beelzebub and my son." Blitzo announces.

Back at the apartment, Blitzo was going to feed his new son, but he got a call.

"What!"

[Hi my little leprechaun… do you know why I'm calling?]

"Don't say it's today?"

[Right Blitzy. I'll be waiting for you at the manor, my little Blitzy.]

"Damn that fucking owl and his…" He stops when he notices Beel's confused look. "I'm going to have to get someone to watch you…" An idea came to her mind.

He goes to M & M. The imp couple are surprised to see their boss with a child.

"Good evening sir. Who is this kitten? " Moxxie asks.

"I will introduce my adopted son. Beelzebub. Said good evening Beel. " The black kitten is shy and hides behind Blitzo.

"Awww! He's so cute!" Millie picks up Beelzebub to hug him.

"And why are you here?" Moxxie asks.

"Tonight is the date Stolas, for the grimoire? "

"You mean your scorching night with Stolas?" Moxxie says.

"Moxx! He has a child here! " She covers the ears of the black kitten who is confused by their conversations.

"I will pick him up before midnight. Be wise Beel. "

The black kitten is now with the two goblins from hell.

"Ok Beelzebub what do you want to do?"

"Play a game!" He choose.

"Alright kitten." The imp girl takes a board game.

The three are playing hellish monopoly.

"Yours, Beel." The black kitten rolled the dice and landed on 4.

"One .. Two… Three… and four! Won! "

"Congratulations Belzébuth. Millie gives him a hug and the Hellcat purrs.

After playing. It's dinner time. Moxxie had to cook. Let's eat the meal, the three are listening to a movie. The Hellcat was having a great time with Moxxie and Millie.

Towards the end, Beelzebub begins to get tired.

"Looks like someone is tired. " Girl imp said.

"I'm… not tired…" Beel rubs his eyes before falling asleep. The white haired imp puts him on the couch.

Millie covers him with a blanket so he can sleep.

"Good night aunty Millie. Good night uncle Moxxie… "He said while sleeping.

"Good night, kitten." She gives a little kiss on the forehead of the black kitten.

Meanwhile, at the Hell Lord's Mansion. Blitzo had finished his date with Stolas.

Blitzo hurries to get dressed, takes the grimoire and goes on tiptoe to avoid waking the demon owl.

He goes through the window like the last time, on the balcony but the weight of the book makes him fall and he lands in the mud which splashes the new dress of Stolas's wife who is doing a photoshoot.

"Sorry for putting your husband down." The owl woman is angry and her voice.

Because of her husband's lover, her photoshoot is spoiled, she takes all the flowerpots from the garden to start it.

Blitzo runs to the fence and runs away.

"Someday you're going to pay, Stolas…" she said in rage.

At the same time, Blitzo arrives at M & M's apartment.

"I came to pick up my son." Blitzo declame.

"Here it is."

"Did you have fun with M & M?" He asks his son.

"Yes, Uncle Moxxie and Aunt Millie are funny. " He said half sleepy.

"It's good. Come home, your new big sister will be happy to meet you. "

"Okay. Dad, why do you have feathers on you? " Beel wondering.

"It? It was birds that attacked me. "M&M chuckle at their boss's response.