1 Prolog

A 20 year old young man had just finished watching Naruto in his room. Because he had just started re-watching the series, that night he only arrived at the chapter when team 7 finished their battle with Zabuza momochi and Yuki Haku. Because he was already sleepy and he had to work the next day, the young man stopped watching and fell asleep.

The young man really liked the character Haku in Naruto. He was disappointed when Haku died at a very young age, even though Haku was very talented at being able to have abilities equivalent to jounin at the age of 15 and was a descendant of the kekkei genkai.

'Ah… I wish Haku could live a little longer. Life really wasn't fair to him. Haku is just a kind and caring child. He was only 15 years old when he died!' thought the young man and he fell asleep.

*-----*

"Huh?"

A little boy with long black hair woke up from his sleep in a panic. The boy looked around, cold sweat starting to trickle down his forehead.

'WHERE AM I NOW???!!!'

He also realized that his body was very small. He looked at his small hands and then ran to the large mirror that was opposite his bed. The child was very surprised when he saw his appearance in the mirror. He has long black hair that reaches his back. His face looks very beautiful, even though he is a boy. And his big soft eyes were light brown.

When the boy was still admiring his appearance and was shocked, his head suddenly felt very painful. The boy screamed in pain while holding his head hard. Along with the pain in his head, the boy saw flashbacks of his previous life. And from there, the young man who was in the body of the children knew several things:

1) His name is Yuki Haku.

2) His mother was killed by his father, and because his father also wanted to kill Haku, he defended himself and ended up killing his own father when he was 4 years old.

3) He currently lives with his uncle, mother's older brother, Zabuza Momochi in the town of Musutafu, after Zabuza kicked him out of the village where he lived when he was 9 years old.

4) Since he was a toddler, he has been trained by village officials to become a professional assassin, and Zabuza perfects Haku's stealth techniques and abilities when he takes on Haku to defend himself.

5) Zabuza took him away out of pity to see Haku suffering because Haku didn't want to be a murderer.

6) Currently Haku is 10 years old.

After the flashback of his life was over, the boy felt his head no longer hurt. 'What's this? Why am I here? And why am I in Haku's body? What happened??!! As I remember last night I finished watching Naruto and slept as usual!! Is this a dream? No! The headache just now was real!! This is real!!!' thought the boy.

Not long after, a grown man called out to Haku from outside his room. "Haku!! What is it?!" Someone exclaimed then immediately broke down the door of Haku's room. The boy looked at the man with a sense of surprise and amazement. In front of him, stood a dark-skinned man with short black hair with shark teeth, slanted eyes and dark brown in color. His big body wears a long white shirt and the man is 183 cm tall.

"Hey Haku! What is it?! Why are you shouting like that?! Are you okay?" asked the man then knelt in front of Haku to check. When Haku looked into his eyes closely, he was absolutely certain that the man in front of him was Zabuza Momochi.

"Zabuza oji-san, um… forgive me for shouting like that. I had a headache just now, but it's fine now." Answer the boy.

"You're breaking out in a cold sweat. Are you really okay?" Zabuza asked with concern.

The boy was a little surprised to see Zabuza's current treatment of him because it was very different from what he saw in the anime. The boy nodded, "Yeah, I'm fine. Sorry to make you worry, oji-san." Answer the boy.

Once again Zabuza watched Haku carefully then after confirming that Haku was fine, he sighed, "That's good then. But just in case, let's go to the doctor today. Now, take a shower and come downstairs for breakfast. We'll be leaving after breakfast, so get ready." Zabuza said then left Haku's room.

"Okay, oji-san." The boy said then went to the bathroom.

"Oh shit, I broke your door again. I'll fix it later." Zabuza said as he set up Haku's bedroom door which was off its hinges. Seeing this, the boy chuckled.

Then after bathing, the child returned to face the mirror. Now he was wearing a white shirt with a high collar and warm material, and rather large dark gray pants that only covered half of his shins.

'Well, I don't know what happened to me. But all of this feels so real. So, I just have to live normally here until this is over. Now I'm Yuki Haku' thought the boy then went downstairs to have breakfast with Zabuza.

After finishing breakfast, the two of them went to the hospital on foot because their house was close to the hospital. When Haku left the house and looked at his surroundings, he realized that this place is not a shinobi world because the environment is too modern for the shinobi world, even in the Boruto era.

And when he sees the news that is displayed on the big screen in a building, he also knows what world he lives in right now. 'This is the world of My Hero Academia.' Haku thought.

'Hm… it's a shame I haven't had time to watch the anime or read the manga even though I've written it down on the list of anime I want to watch. So I don't know the story. But at least I've read the synopsis. The world is quite dangerous because here the power of quirks greatly affects daily life.' Haku thought.

After walking for 10 minutes, Haku and Zabuza finally arrived at the hospital. As said by Haku, the results of the examination stated that there was nothing wrong with Haku. Then they both went home.

Shortly after the two of them got home, Zabuza received a call from someone. "Ah? Call of duty? I'm off today! tsk! Yes, yes, I'm getting ready first." Zabuza said then hung up the phone.

"Oh, how annoying!! Even though I want to be relax today!!!" Zabuza complaining and then went straight to his room. Haku walked to the sofa in the living room and sat there. He took the TV remote and turned it on.

Live TV shows a news broadcast live from a crime scene. Seen there is a battle between a group of villains with several heroes on the streets. But not long after, a burly man with blond hair came and instantly defeated the villains with great ease.

That person is All Might. 'Oh… I seem to have caught a glimpse of that person. So he is the strongest hero in Japan. How striking.' Haku thought. Then when Zabuza came out of his room, Haku could see that Zabuza was wearing a dark blue police uniform and carrying a bag.

"Oji-san, where are you going?" asked the curious Haku.

"Haku, I will be away for 3 days to take care of police work. Be a good boy for me, if you want to eat, you can warm the food I made today or you can order food to be delivered here. Understand?".

"Understood, oji-san."

"Then I'll go first. Remember not to leave the house unless there is an emergency." Zabuza said as he put on his boots. Haku who was standing behind Zabuza nodded, "Understood. Be careful oji-san."

Zabuza nodded then left the house, leaving Haku alone in the house. After Zabuza left, Haku went back to watch his favorite show on TV until the evening. And when night fell, Haku turned off the TV and went to the isolation room in the basement to practice.

He already has a memory of using ninjutsu and taijutsu so he doesn't need to repeat learning from the beginning and now just retrains and improves the abilities he has so that his body stays awake and not stiff.

This was also used by Haku to learn new ninjutsu and taijutsu that did not belong to Haku in Naruto. Because he has affiliation for water and wind, Haku tries to practice all ninjutsu related to water and wind as much as he can such as rasengan, kagebunshin, and so on.