that just the beginning of session

Riley's eyes opened slowly, flooded with a combination of fear, exhaustion, and confusion. He had no idea how much time had passed since the last session ended, but it was clear that he wasn't in a better shape than he was before. Desperately trying to ignore his overwhelming fever, he breathed heavy, ragged breaths as he waited in his designated position for the next session to begin.

Although every molecule in his body wanted to collapse with fatigue, he remained still; the only movements coming from the shaking of his body. He had been told that he would be punished severely if he moved during the session, and he didn't want to give the machine an excuse to punish him even more.

Finally, after what felt like hours, Riley heard the machine start whirring as it began to come to life. His breathing intensified as he braced himself for what was coming. As the machine came to life, it went to work with a force that could only be described as merciless. He could feel the machine's power and strength as it violently pounded against his body, pushing his fever-stricken frame to its very limits.

No matter how hard he tried, he could not keep himself from shaking uncontrollably at certain points. He wanted the session to end, but he was too weak to find the words or the courage to do so. Finally, after what felt like an eternity, he felt the machine slowly coming to a stop.

Riley let out a sigh of relief, trying to take solace in the fact that the worst was (hopefully) over. But before he could enjoy his brief respite, he realized just how severe the session has been-- he was more exhausted and weak than ever. Despite his body's protests, he steeled himself for the next and presumably more intense session to come.