Chapter 1: Curiosity of the Strongest Moon

Muzan is happy how Tanjiro had developed. Some years had passed since he 'adopted' him and he became the strongest of his moons.

Trained under Kokushibo to learn the Moon Breathing Form, which Kokushibo agreed. Muzan watched from the distance as Kokushibo quickly became close with his child. He imagines it is because Tanjiro is similar to Yoriichi but Tanjiro's personality... is quite charming.

Since the period of time where Tanjiro was being trained, he can tell Kokushibo is way more... relaxed is the word maybe? Kokushibo not only trains Tanjiro, but keeps conversations with him.

His other moons also like him. Maybe way too much. But as they know their place, there will be no problems.

The one thing that worries him, is Tanjiro's curiosity.

Due that he doesn't remember anything from his human life, when he asks him about his prior life, he just implants fake memories in his mind. But sometimes... he just looks for himself.

Right now, he should be in Asakusa taking a walk. He ordered some demons from the area to watch him.

*Asakusa*

Tanjiro, wearing his green checkered haori, a white button up shirt and black pants with black shoes. He had his right eye closed and his hanafuda earings on his ears. On his left eye, there are the kanji of 'Zero'.

Tanjiro has been on Asakusa before, but still, he isn't used to the bright lights of this part of the city. He has memories of Father taking him here as a child to see the shows. Memories how he held his hand as they transverse the busy streets.

Those memories made him smile. He just wishes that Sensei or Senpai would like to come here.

Someone hugged his shoulder "Hey! You are the prince!"

Tanjiro looked at the female demon with hazel eyes, black hair with orange ends. She was grinning at him "Do... you need help?"

"Susamaru! Stop bothering our prince!" Another demon with short black hair said to this Susamaru. Tanjiro noticed he has his eyes closed as he approached them.

Susamaru laughed "Relax Yahaba! Soon we will be working next to him, right prince!?"

Tanjiro sighed "Did Father asked you to accompany me?"

Susamaru nodded "That's right. Lord gave us the honor of making sure you enjoy your stay here."

Tanjiro smiled at them "Thank you, but I believe I know my way."

Yahaba nodded "That might be, but Lord still wants us to be your guides. I hope you don't mind our presence."

Tanjiro nodded. If he refused, Father might kill them if they fail, even if it was his fault. "Very well. Do you know if there is any new show going on?"

Yahaba hummed "Well, Ishiyama Gunki is being shown on the theatre. It is the story of-"

"Screw that! Let's go to get some food!" Susamaru interrupted Yahaba "I know that the prince wants to do something fun rather to bore to death."

Yahaba growled "He asked to see a show, not get involved in some brutish activity, Susamaru. Besides, I rather not get my clothes dirty."

As Tanjiro heard their discussion, he looked from the corner of his left eye, a young-looking demon with lavender eyes that glared at him. Once he noticed he was spotted he quickly took off.

Tanjiro was going to ask his 'escorts' who that was, but they were too busy arguing, so he decided to go by himself.

"...Well! Why don't we let the prince decide!?" Susamaru challenged and Yahaba nodded.

"Finally, you say something with common sense and decency." They turned to where Tanjiro was.

"Prince!?"

Tanjiro used the scent of the demon to trail him, and frowned when the scent ended on a dead end. But... the scent was covering the entire wall.

He opened his right eye, completely pale and the veins around it bulged. One of his Blood Arts, Eye of the Moon. The ability to predict and copy any physical move. Besides being able to see everything, including illusions.

As he saw that the wall was fake, he continued his way, following the scent of the demon. After going across more fake walls, he arrived at a clinic.

He looked around the grounds, it didn't look like nothing different from any normal place. But why was that demon so protective of this place.

He ducked an attack, and with his right eye, he saw how the demon was invisible. He narrowed his eyes as he created a flesh sword and took a deep breath "Moon Breathing First Form: Dark Moon, Evening Palace."

He cut the demon in two, separating his waist from his torso. As he fell and became visible again, he pointed the tip of the blade to his neck "Who are you?"

The demon glared at him as the door of the clinic opened "Tanjiro, was it?"

Tanjiro turned to see the demon Father has been chasing for decades "Tamayo the Fugitive."

Tamayo nodded and bowed her head "Yes, please forgive Yushiro, I asked him to spy you to confirm my theory."

Tanjiro walked to Tamayo "What theory?"

"That you don't know who you are."

Tanjiro stopped and raised an eyebrow "What's that supposed to mean?"

Tamayo smiled at him "Do you remember the days when you were human?"

Tanjiro frowned "Yes. At least... most of it."

Tamayo nodded "I imagined that. But how do you know what is real, and what isn't? What you lived, and what is a lie from That Man?"

Tanjiro narrowed his eyes "Watch your words Tamayo."

Tamayo kept her gaze on him "Tanjiro, do you want to know your past?"

Tanjiro closed his eyes "Let's say; I will cooperate with you, how do I know you will not betray me, or that what you show me is real?"

"I am afraid I can't force you to trust me, but please, think about this." Tamayo said and Tanjiro nodded.

"Very well." and with that, he left.

As he walked on the streets of Asakusa he turned when someone screamed "PRINCE!"

He looked as Susamaru who shook him by the shoulders "Where were you!?"

"Susamaru! Stop that!" Yahaba scolded "Prince, next time you wish to explore, please warn us first. We searched for you everywhere."

Tanjiro nodded "Sorry. I thought I saw someone I knew." he turned to the two demons "Say, why do you want to become part of the Twelve Moons so badly?"

Susamaru raised a brow and Yahaba looked perplexed "Why not? I mean, we can serve Lord directly!" Susamaru exclaimed and Yahaba nodded.

"Indeed. Our life goal is to serve him, what better way than being a Moon."

Tanjiro nodded "I see. But you are aware than in Asakusa, your chances to become one lowers right?" Seeing Susamaru and Yahaba get nervous he smiled "I travel a lot, and Father insists in me having a bodyguard. Most of them are... not the best people to have around. You two are good."

Yahaba looked shocked "You... are asking us to go with you?"

Tanjiro nodded "Yes. I know I am asking a lot for you to abandon your home, but if you want to join the Twelve Moons, you will need to travel."

Susamaru grinned "Great! Let's go already!" She said dragging Tanjiro to the exit, lifting dust in the air.

"Susamaru! Don't get me dirty you brute!"

Tanjiro sighed. At least this two will be good company to have. He turned to the wall hiding the clinic.

What those her words mean exactly?

Next Chapter: A Little Fox