In a white space with nothing but white everywhere. 

"So. I died.", said a young man about 20 years old to the white ball of light floating in front of him.

"Yes. " said the ball.

"Well nothing is interesting in life anyway, meanwhile you are quite interesting, what are you?", he asked as he tilted his head.

The ball jumping in midair said, "Let me introduce myself, My name is Xing, and my code name is System 03. You can call whichever you like. I help my host to travel to different worlds."

"My name is Shen AnZian." Said the young man.

Can you make a contract with me and be my host?"

"So what do I have to do?"

"Sometimes the worlds get invaded by a foreign entity, a soul reaches out to us to help them or some children of luck get out of control.

So we are responsible for world balance." Xing said.

Shen Anzian asked, "What will I get in return?"

"Well, you will get points, live, and experience different worlds. When you have enough points you can unbind the contract and resume a normal life in any world of choice.

Shen AnZian was an orphan in his world. An ordinary life, he lived in the orphanage since he was little and moved out during high school. After graduating, while looking for a job died in a car collision. Dying at the age of eighteen was not the unexpected part, it was waking up in this place, and being greeted by this white ball, which was jumping and talking.

…

After the explanation he was thinking that it was not a bad offer

Maybe he will find some interesting things in those worlds. So, he agreed to the deal" Okay, Let's sign the contract." 

OK said, Xing

As soon as they said this, a translucent panel came into their view. They both pressed 'accept'. Then the panels collapsed and turned into particles of light then got absorbed in their body.

"Congratulations host and welcome. Now. I will give you your beginner's gifts and points", said Xing in his childish voice excitedly.

AnZian was quite happy as common sense told him these were helpful. He got three gifts and 10000 beginner points.

The gifts were concentration, acting(Lv1), and 'any choice'.

"Wow, the host is quite lucky your gifts are very useful for a beginner You can choose a skill of your choice on your status panel.

You can also buy props from the shopping panel with the points. Wait, what is this?" He asked.

There was a panel that showed that Shen Anzian won 100.000 points in a lucky draw.

Xing was so excited that he was jumping," Host, you are my master host from now, you are so lucky. No host has ever been lucky enough to win that lottery that I didn't even know existed."

'Am I that lucky, luck has never stood by my side ever since I knew, It's like my bad luck also passed away with my body'.He chuckled in irony.

…

As he was checking out the shop he saw some ridiculously expensive and shocking things "Wouldn't a military-grade tank in the cultivation world and a spaceship in a historical world be a problem".

"That is why you shouldn't buy them those high-grade things in a world where it doesn't make sense," Xing said monotonously. 

AnZian chuckled as he checked the skill section. There were various skills, such as art(Lv1), music (Lv1), martial arts (Lv1), medicine (Lv1), cooking (Lv1), and many more.

After thinking for some time he chose medicine.

In the description, it is written as basic medical knowledge of different worlds, with a price of 2000 points. Thankfully it was a gift.

Xing informed AnZian, "You have to separately train these skills in the training space. So, I will send you there."

"All right", Time to train.

He didn't know how much time had passed but it felt like a long time.

"Master, you completed the training quite fast, it's almost 200 years in your previous world."

"Yeah, there were so many worlds' worth of medical knowledge, it took time. I'm so tired mentally. Xing I need a bed and some furniture"

"Then I will buy some necessary things "

"Alright, thank you"

Then a bed materialized along with a sofa, table, chair, and some little decorations most being in pastel blue color. AnZian was quite satisfied with the space.

"Host this space will grow with you then we can add more things here.You can sleep now when you wake up the transfer channel will be ready"

He fell asleep as soon as he hit the mattress as the bed was soft enough to his liking.

…

When he woke up said good morning and asked if the channel was ready.

"Host we are ready now. Please bear with the discomfort because of transfer"

"I am very much excited alright. I'm ready"

[Soul transfer commencing in 3.. 2.. 1..]