Prologue
14 years ago
In a bar in Kamino, a purple mist bartender was doing his normal routine, taking care of young boy named Tomura, running his bar, and transporting stuff for his boss he called Sensei. Then he noticed that he is running low on food so he went to go get some more, he closed the bar for a little bit and told Tomura he will back soon. On his way back to the bar he heard a baby crying in the alley, he then went to the source and came across a dead woman laying in the alley and a crying green hair and eye baby in her arms. The bartender saw it was a mugging went wrong and he couldn't just leave a baby alone in an alley, he then used his quirk to warp him and the baby back to the bar. When he got back Tomura saw the baby and asked "Kurogiri, what do have there?"
3 years after Kurogiri took the baby
Kurogiri named the baby boy Izuku and he was now 4 years old and it was time to check to see if he had a quirk. Izuku was so excited and he hoped it was a cool quirk like his dad's quirk, since Kurogiri took him in he refers Kurogiri as dad. Izuku indeed had quirk but they had to wait to see what it was. One day at the bar two guys were fighting while Kurogiri was in the back to restock the front and blood was spilled from both men. Their blood got in Izuku drink and after finishing his blood milk combination, he then asked the two men to stop fighting and they stopped motionless. When Kurogiri enter and saw the two men not being able to move and when he asked them to leave, they said they couldn't move but when Izuku told them to leave they were freaking out because their bodies were on the young boy's command. Sensei appeared on the screen and he said he everything and told Izuku and Kurogiri what his quirk was, because he had a fallen ally with the exact same quirk called Blood Puppet. The quirk was simple to explain whoever's blood the user consumes he can control them and use their blood to make weapons.
Izuku was so happy to have a quirk and Kurogiri was worried for Izuku might do next but was happy the Izuku was happy.
6 years after Izuku was taken in by Kurogiri
Izuku was training his body, mind, and quirk to its fullest, he learned fighting styles that will help him activated his quirk, the stronger physically and mentally he becomes the more people he can control and once. He would lift heavy items for his dad, spar with his brother Tomura, and learn to take blood from customers in the bar without them noticing. One day, Kurogiri went to restock food and a customer at the bar asked for a drink, Izuku always loved watching his dad making drinks, it could rival his hobby of analyzing quirks of heroes, villains, vigilantes, and other people; Izuku then asked the man what he what drink he wanted, and he went to make it. The looked at Izuku and was impress on how good he was at making his drink and then Izuku slid the drink the man. The man took the drink after he took a sip, he asked for another one, then more people asked the Izuku the same thing and they loved it. When Kurogiri got he saw Izuku making drinks and the customers loved them, he then closed the bar a few hours later. He asked, "Why did you do that?"
"Dad, didn't you tell me never a man waiting for his drink?" Izuku responded
Kurogiri saw a lot of talent in Izuku, 'Not only is my son good at analyzing quirks, but also bartending' Kurogiri thought. (At this point since Izuku calls Kurogiri 'dad' Kurogiri think of him as his son.)
Kurogiri looked at his son and asked, "Would you like to learn about bartending?"
Izuku looked at his dad with a smile and said, "Yes, dad."
Present Day
Izuku is now 15 years old, a bartender, and villain just like his dad; his villain name is known as the "Puppet Master" because how he controls people like puppets, he is ranked as a S-ranked villain after taking control of 10 pro heroes and made them help him to robbing a bank getting away with 1,096,140,000 yen ($10,000,000) and killed the pro heroes that were under his control. That was his debut, Tomura was impressed with his little brother's debut and knew that he was ready for his plan. Izuku's villain outfit was a black suit and dress pants with a grey dress shirt and a red tie, as well as a black and white venetian style mask with a filter covering his mouth just in case of gas. Izuku loved it because it was comfortable and stylish, and Kurogiri loved it because it suited him. Growing with his dad Izuku learned to always to be polite and to be a gentleman to other people, but only kill when it is necessary, sure killing 10 pro heroes was a bit too much, but he wanted to show the world that he shouldn't be taken lightly. Tomura turned to Izuku and ask, "Do you want to join our raid next week Izu-kun?"
"It would be my pleasure nii-chan." Izuku responded with a big, bright smile.