In a separated world from the rest of the dimensions,  there's a single island floating where a nine story building is erected there. On the uppermost floor there's a queue of soul, waiting for their turn to talk with the single authority here to read their life's verdict, whether their soul will reincarnate, go to afterlife or cleanse their soul by the hell fire. 

"Cyril Lancaster. Male. From dimension five, planet earth," behind the office desk, there is a gigantic person. "Tell me,  Cyril is your life on earth great? Do you miss your life?"

The giant was so enthusiastic in knowing his life but Cyril can't clearly remember his life back on earth. " . . . I kinda can't remember, sir."

"Aw, poor thing," a glint of disappointment flashed in the eyes of the giant but his expression quickly resumed to its cheerful expression again ,"Ah, let me introduced myself. In your world you call me in various names like Enma,  Yomi, Satan, Hades, Pluto or something like that. But here in Department of Hell, call me Manager, for consistency's sake." Manager looks about 12 or 13 years old boy wearing many layers of wide-sleeved robes in color of white, red and gold. He looks like young, pretty child actor than a person-in-charge of the Department of Hell.

"Okay Manag—."

"Do you want me to reincarnate you?"

Cyril is shocked to the sudden question of Manager because he saw the souls before him, the judgement on them are immediately taken into action. Manager did not even chit-chat with them like he is doing with Cyril Caster right now. "Can I ask what you want in exchange?"

Manager got stunned at the inquiry of Cyril. "Its good you know that everything given to you with equivalent exchange." In a single waved of his hand they teleported to a different location, a study room. "Right now, Hell Department is giving a limited-time offer for a single soul and that luckly person is no other than you! If you accomplish the mission, we will give you the opportunity to continue your life as if you did not die or you can choose the set-up of your next reincarnation! Very appealing, right? Right?!"

" . . . En," Cyril agree but this offer sounds fishy like a scam. "And the challenge is . . .?"

"You don't have to fret abou it, dear. It's soooo eazy." Manager may have said its easy but Cyril doesn't believe their meaning of the word 'easy' is the same. "You just have to collect some scattered soul fragments. That's all. East,  right?" In his last life, Manager must be a salesman, he's so annoying. Cyril reluctantly concur to Manager's offer.

Taken from Royal Road, this narrative should be reported if found on Amazon.

"I knew it you would agree! Hahaha!" 

"So . . . Where can I get those soul fragments?"

"Hm? At various dimensions, tee hee," Manager smiled sweetly.

"Can I back down to our deal?"

"You can't! As you know, we, from Hell Department hates people who breaks promises and contracts. We even pull the tongues of liars," Manager gave a hallowed smile, a dark aura is coming from him.

"Okay, okay. Explain everything I need to know," If Cyril did not agree Manager will probably send his soul to the ninth level of hell.

The mission of the limited-time offer is collecting the dispersed soul fragments from various dimensions. In order to travel from dimension to another dimension, Cyril has to transmigrate. At the first few years after his transmigration in that dimension he will living his life there without remembering neither his life as Cyril Caster, Manager nor the limited-time offer. He will just recall everything all of sudden.

Cyril raised his questions ,"Then, what if after living my life in another dimension I don't want to look for those soul fragments?"

Manager laughed like a lunatic as if he heard this century's funniest joke ,"Hahaha sure you can but I'll rip your soul out of that body. Let's continue with the job orientation, okay?"

During those transmigration trips, Manager apparently got hooked with novels with MC having a system as their companion so he wants to assign a system to Cyril too. If maybe Manager will assigned a system with an annoying attitude, Cyril will be just annoyed to death. Therefore, he refused.

Instead Manager give him a virtual screen where Cyril could view his mission progressed, side missions, accessed the virtual store and look for information.

The side missions are tasks related to the life his current life and the people around him. Each accomplished side mission rewards an appropriate amount of points. Those earned points be used to exchange available skills and items in the virtual store.

"Ah, by the way you're neither allowed to mass murder, endangered or extinct any race or species in any dimension you're travelling to, the gods governing that world will tantrum and boycott again ,"Manager stretch his body after becoming numb for sitting a long time ,"Enjoy your transmigration trip, dear," he waved  goodbye. "See you later. Don't forget to bring back souvenirs."

"You're going to send me off like that?!," Cyril tried to oppose the force sucking his soul out of this force but he can't. "Arg! Shlt!

× • × • × • ×

Behind the scenes . . .

Manager: Congratulations sir~ *throws confetti* You just won our transmigration trip package (ﾉﾟ▽ﾟ)ﾉ

Cyril: No, I didn't join any contest (⊙o⊙)

Manager: We,  the Hell Supermarket, never accepts returns and refunds ( • ̀_•́ )✧

Cyril: But I did not really join any contest. You must have mistaken me for somebody else (|||⊙_⊙)

Manager: You'll accept it or I'll kill 'ya? (∩v∩)

Cyril: I-i'll accept (╥_╥) Help me . . .