DelzGB

Within the virtual world of “Avalon Online”, Finn, or otherwise known as “Echo” within the game, was one of its greatest players. After logging off from a long session, however, he notices something awry outside of his apartment. 
The streets were flooded with chaos, screams echo through the night, and hell is loot loose. Monsters from Avalon Online are running through the streets, wrecking havoc. In the midst of this hellish awakening, Finn is greeted with the one gift bestowed to humanity in this dark hour:
[...Assessing life experience…] 
[Assessment Complete] 
[Name: Finn Thorne] 
[Age: 20] 
[Designated Class: Assassin] 
[Starting Level: 5] 
[A [Legacy System] has been bestowed to you for your accomplishments within Avalon.]
[Assimilation System Awakened.] 
In this twisted turn, as the world as it was once known is gone with the arrival of magic and monsters, the remnants of humanity must level up if they wish to survive. 
Finn is left in this dark, hopeless apocalypse, using his own experience from Avalon Online to best survive what seems to be an impossible task.

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Level-Up Apocalypse: Surviving With The Assimilation System

"You might be right. The choice must be easy for you, right?" Sirius asked.

"--" Finn didn't respond, not quite knowing what the man meant, though not liking what it suggested.

Sirius continued with a small smile, bringing his thumb and index finger together before–

As that sound met Finn's ears, he found the scenery of the crimson cavern replaced by a luscious garden of colorful flowers, blooming with life.

"Huh?--" Finn let out, perplexed at the sudden transportation as he looked around.

Above him, the sky was a reverse field of flowers, completely engulfing him in the scenic majesty of nature before he looked ahead at the man who seemingly brought them both there.

Bitter Truth