Sword Art Online - Vol 5 Chapter 0: Prologue

The story starts on earth, after some unknown circumstances, the world was suddenly invaded by monsters from other worlds. Many died and even more turned into zombies, starting what many would call 'The apocalypse Era'.

Rin, a normal teenage boy who lost all of his family members was on the verge of falling into despair when a goddess appeared and sent him to another world that was very similar to a game Rin played before the apocalypse.

Her goal from this was simple, trample on all the protagonists and become the strongest creature in that world for a chance to get back what he thought he lost forever.

Accompanied by a cold beauty, both of them embark on a new journey to become stronger, get back to their world and fix everything.

“Chosen Heroes! Scour these worlds as the champions of us, the gods!”When an unsuspecting class of thirty die in a mysterious incident, the benevolent gods take mercy and reincarnate them as Otherworldly Heroes.In a world of magic and swords, the Heroes are forced against hardships as they face off the monsters threatening the world, the evil forces lurking in the shadows, and even themselves and the other heroes. Secrets hidden in their pasts will surface and their skills, trust and love will be put to test as they will tackle their new home.The heroes will... Except this one.This hero is sleeping.

Li Guanqi was only six when he killed his abusive uncle to save his mother. Moved by the tragedies that had befallen the tiny child, an old man named Su Xuan adopted Li Guanqi. Eight years later, he left the village and told Li Guanqi to join the Daxia Sword Sect — while it may not be the richest sect, it was virtuous. Then, he gave Li Guanqi a sword coffin and made him promise 2 things: that he would always carry it on his back, and to only tell people it was an ordinary sword box.Will he be able to uncover the mysteries of his sword coffin? Why was there a spirit trapped inside it? Who exactly was his grandfather?His sister was worked to death, his mother was seriously ill, and his gambling-addicted uncle even set his sights on the money meant for his sister’s funeral. Li Guanqi, wielding a knife, killed the man, until he encountered an old man named Su Xuan. Eight years later, the youth had become a swordbearer. Behind him was not a scabbard, but a sword coffin, the coffin for burying swords! From then on, this youth with ambitions as vast as the skies stepped into the blood-soaked world of cultivation!

Gou Liang travels through worlds in order to complete a mysterious and arduous mission…

16 worlds in total:

School Campus: Strawberry Flavored Scholar Gong √
Entertainment circle: Lemon Flavored Film Emperor Gong √
Ancient Time: Honey Tangerine Flavored Shadow Guard Gong √
WuXia: Melon Flavored Senior Brother √
Beastmen: Pineapple flavored Beastmen Gong √
Ghost Spirits: Snow Pear Flavored Dead Gong √
Ancient Time: Gr*pe Flavored Regent Gong √
Apocalypse: Banana Flavored Boss Gong √
Interstellar: Pomegranate Flavored Sentinel Gong √
Modern: Citrus Flavored Aristocrat Gong √
Mecha: Sweet Jujube flavored Lunar New Year Gong √
Ancient Time: Durian Flavored Battle God Gong √
Magic: Watermelon Flavored Blacken Gong √
Cultivation: Cherry Flavored Disciple Gong √
Fantasy: Blueberry Flavored Demon King Gong √
Celestial World: Bayberry flavored Senior Immortal Gong √

- Description from Novelupdates