Kidnapped?

              Shin yelped in pain as the second fist struck his gut. He was about to get better of the assailant when the third one followed right after. Shin tried to creep away, struggling, but he felt an overwhelming pressure over his body. The assailant mugged against his body, hammering, jabbing, hacking at his fist like professional boxing. The fists dug into his stomach, bringing out the painful whimper as well as the food he had eaten before sleeping. 

            Grasping, panting, coughing, and crying, he finds a little lucidity of mind.

Last time, he remembered he slept early last night, as he had to be in top form for the incoming trial in two days. Like a few of his friends and classmates, even in his first year he got the chance to take part in the trial and was looking forward to it. He was supposed to be going to the trial, what was happening now?