Glitched Isekai

Sam, Aria and Arisa rode on two horses and headed for the ancient tomb. They only hired two horses because they discovered that Sam did not know how to ride a horse!

So Aria rode on a horse by herself, while Sam sat behind Arisa, holding her waist as he shared a horse with her. The reason he shared the horse with her and not with Aria is because Aria had to help him get on the horse and sit behind Arisa. 

Sam sat quietly, embarrassed that he didn't know how to ride and that these two pretty girls had to take the leading role in a simple trip to a nearby ancient tomb. 

The ancient tomb is famous in the town of Willow. It's been there even before the town was settled there and no one has been able to come out alive. Many have tried to investigate the tomb, but those that have gone beyond the first section have all disappeared and were never heard of again. 

As they rode, Sam started noticing Arisa's breasts bouncing up and down his arms as he held her waist. 

The longer they rode, the more aroused he became, and pretty soon, his erect penis was pressing into the back of Arisa's back. Luckily, Aria was riding ahead while Arisa and Sam's horse was behind, so she didn't see anything. 

Otherwise she would have clearly noticed Sam's huge rod poking her younger sister's back. 

"Samsara... is that your... uh.... your..." Arisa started asking.

"Sorry, I can't help it" Sam whispered in her ear.

She nodded, then reached behind with her hand, grabbing his cock and lifting her skirt and her butt, she placed his dick under her body, between her legs and sat on it. 

As she was wearing a skirt and he was only wearing a robe, his naked cock was completely hidden while under all that cloth. 

He felt her pussy under her panties, rubbing up and down the length of his cock. The tip of his long penis poke out the front of her skirt and she started teasing and rubbing the tip of his cock with one of her hands. 

"What...what are you doing?" Sam whispered

"I don't know. This is the first time I've felt a... uh... thing before. I want to touch it and feel it" she answered.

Before long, he started cumming, spurting his seed all over the front of her skirt and down her legs. 

"Warm..." she said dreamily as she used her skirt to wipe his cum while they rode. "And so much too" she said taking a taste from some that was on her hand. 

"Alright, we're nearly there" Aria suddenly shouted. 

Arisa quickly cleaned up all of the evidence of Sam's ejaculate with her skirt and Sam tried to move, but his semi erect penis was still stuck under her body. 

Both horses slowed down in front of the entrance to the tomb and Aria hopped off her horse gracefully. 

Just as she approached Sam to help him down, he panicked and tried to get off himself. He felt Arisa adjust her butt and suddenly he felt released and he fell down the horse. 

Aria could swear he saw something swinging in the air for split second as he landed upside down on the ground. 

Arisa laughed as she hopped off her horse too and landed right next to Sam. 

From his position on the ground, he caught a glimpse under her skirt, and saw that her inner thighs and even her panties were drenched with his sperm. 

Suddenly, Aria's hand appeared, offering to pull him up. He smiled and grabbed her hand, and she was quite strong as she effortlessly pulled him to a standing position. 

They tethered their horses and walked to the entrance of the cave. Sam communicated with Tauriel, and found out that she was already inside.

They entered the tomb and found that there was a first level, where there were lit torches all around and an entrance to a deeper part of the tomb. All around the first level were warning signs not to enter and even evidence of the tomb being closed up by the town authorities. However, there were always adventurers who will break in to look for treasures.

They looked at each other and nodded, entering the next level together.

Aria conjured flame in her hand to light the way as they walked deeper and deeper into the tomb.

Suddenly, the lights went out.

"Aria? What...." was all he heard of Arisa's voice when he heard rumbling noises.

He ducked immediately into the Nexus and saw something phase through his body. 

"What was that?" he thought as he tried to search around for the sisters while within the Nexus. 

He exited the Nexus again, and started calling their names. 

"Aria? Arisa?" he called. They responded, but their voices were far away. 

In the distance, he could see flames and rumbling sounds. He guessed it was Aria fighting. 

Suddenly, he heard a scream. It sounded just like Arisa, but he could not determine where or how far it was. 

"Samsara? Arisa!" Aria yelled and tried to conjure flame again. But there was some sort of fog in the huge area they were in, and from far, Sam could only see a slight flame although it was blazing brightly in Aria's hand. 

Just then, Sam's body glowed again. In his mind link, the rest of the familiars had successfully banished the demon in the poor district of Willow, and he just leveled up again to level 15. 

He suddenly felt someone pushing his shoulder, causing him to duck as a slash flashed through the air, slicing through where his neck was. 

He realized it was Tauriel who suddenly appeared and was firing arrows at the unseen enemy. 

"Damn it" he thought as he summoned all his familiars who all appeared around him, flashing their weapons. 

Hermione, Sabrina and Alex lit up the area with multiple spells that conjured light. 

With the area lit, they could see the huge cave they were in, and it was filled with wraith like beings with sharp claws. 

He looked all around and found that he was on a stone bridge and that Aria was on another bridge separated from him by quite a distance.

There were multiple stone bridges criss-crossing randomly, some connected and some unconnected, all leading to different paths deeper into the tomb. 

"I see you!" Aria yelled as she tried to make her way towards him. Sam's area was brightly lit by his mages making it easy to see him, but Aria was walking in mostly darkness, except for the flame in her hand. 

Suddenly she felt a slash across her chest. She screamed as she felt the pain of someone attacking her, causing a big gash in front of her chest, tearing her blouse open and revealing both her breasts were bleeding with a huge gash across them.  

Aria was going berserk from afar, as she lit her whole body up in flames and started shooting fireballs indiscriminately. 

"Aria! Calm down!" Sam yelled as Hermione conjured a magic shield that blocked a fireball that was coming in their direction. 

"It's too late. She has been slashed. Those wraiths' blades are poisonous" Tauriel said as she stood next to Sam. 

"Not only that, they have the ability to eat souls" Sabrina added. 

He looked around and saw Arisa's body on another bridge, surrounded by more of the wraiths. She was unconscious and bleeding from multiple wounds. 

"No! Arisa!" Sam yelled....