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

Much later, as in after a couple of months, Kurai would come to be very grateful for the training he'd endured under Abyss' guidance, but as he found himself climbing the outside of the tower with only his hands and feet and with another small insect-like creature deciding to attack him out of nowhere a few days into his training, Kurai was seriously wondering whether he'd finally lost his mind.

He didn't even dare to look down as he slowly but steadily made his way to the marker that Abyss had placed earlier that day, hoping that there would be some way to get down fast without likely breaking every bone in his mental body, but he doubted it, so he simply continued to climb.

He sighed in relief as he finally reached the marker, only to find the opening of a small cave-like indentation right next to it, allowing him to grab it before he settled down to rest for a bit.

Training