Mortifae

Kurai Tachi is a normal student who just wants to study and do well. Lin Hayashi is his childhood friend and roommate who seems determined to spend the rest of her life playing games.

When Lin purchases headgear for a chance to enter the beta of the newest VR game 'Seradeihn', Kurai suddenly finds himself trapped in the game in an Avatar that he doesn't know how to use instead, but not for long.

Soon he finds that the game itself may hold a link to memories he'd long ago thought lost and the picture they paint proves to be a lot more sinister as they expose a plot that would shock the world as well as the other dimensions that soon become involved.

Seradeihn

Contrary to what Kurai thought, the sanctuary that the woman spoke of was a lot closer to the city than he believed and they entered a strange rock formation about 30 minutes outside of the city when riding a mount, which Karmina easily seemed to procure for them.

It was nothing much at first sight, merely something that could be used as a marker within the landscape, but then Kurai realized that it seemed to become bigger the closer they came to it.

Finally, they reached the steep slope of the hill and the woman dismounted before stepping forward, and to Kurai's astonishment, she reached forward and slid her hand in between the rocks before lightly pulling, and suddenly an opening revealed itself as she pulled the concealing energy away, much like a celebrity parting a curtain to go backstage.

The world beyond the curtain was dark, but Abyss didn't hesitate as he guided the mount forward and into the darkness.

Abyssal Plains of the Lost