Chapter203 of "Prison School" is already available for online reading through My Manga. The latest chapter continues the battle between ASC and USC.
The continuation of the battle means the story of the Chairman, who is currently suffering from amnesia, has been put on hold as of this writing. However, the latest chapter gets very interesting as it is action packed just like its previous iteration. Before continuing with the possible events, here's a brief recap.
The battle between ASC and USC has commenced and even though they are ten times smaller than their opponent, they decided to fight. The soda drinking system installed by the boys were actually effective at first in waking up the real Meiko, it eventually crashed because it chocked the Vice President and bloated her stomach.
The delivery system was removed by Mari but the action only temporarily revives the Vice President. She finally refuses to drink any more soda because it made her belly bigger than ever. The event has been attributed to the "ant prediction" made earlier about USC. Because of the failure of soda delivery system, the Vice President reverts to her older, bullied self.
Even though the boys and the USC have very slim chance of winning, there is still a possibility that they could have a fighting chance. After all, the only problem with the Vice President is her mental state which means they would have to find some triggering factor to wake her up.
The Reddit forum dedicated to the prediction of the next events in the manga has some raw images from the next chapter with some clues on what would happen. Based on the images, Meiko might get out of her current bloated state and become Vice Chairman again. However, she is too weak and asks the help of one of the boys (most likely Kiyoshi) to win the game.
