From Extra to Main: Reincarnated 3 years before Novel timeline FEMR

[Series: Road to Villain II]
A universe: Astros Universe exhibited on a laptop, owned by a young boy, piques his curiosity.
He attempted to merged with it, but the world restarted.
By fate, he also received a side mission:
[Kill the antagonist: Sam]
[Reward: Chance to travel 'Astros Universe']
[Fail: *&*^*^*&*]
Everything changed, every role altered.
Will it matter to him?
Will he be able to complete the mission?
Unknown to the looming dangers, can Sam avoid disaster?
Surely, destiny is the most twisted truth, which no one can deny. Destiny doesn't favor anyone; it simply chooses its medium based on merit.

Author:
[The novel's world is a restart version of "Reincarnated in a Novel World" with the same characters, although their roles would be altered.
Their altered roles would be in affect when the 'Return as strongest Player' novel's timeline starts.]
[Some starting chapters may match, but don't worry, for these reasons: I will lock premium content from chapter 120 onwards.]
[Author: If you have confusion, please ask.]