Ep 4. Inside ~Evil Spirit~

Inside ~Evil Spirit~ is the fourth episode of season 2 of the original Japanese version of Mob Psycho 100. The episode begins with Mob waking up in a strange and dark room. Confused and disorientated, he tries to find a way out but is confronted by an evil spirit who claims to have been waiting for him.

As Mob tries to defend himself from the evil spirit, he discovers that he is locked inside his own subconscious mind. The evil spirit, who has taken on the guise of Mob's former teacher, claims to be there to purge Mob of his negative emotions and help him become a better person.

Meanwhile, outside of Mob's mind, his friends and family are trying to figure out how to bring him back to reality. Reigen, in particular, is determined to find a way to rescue Mob and puts his own life on the line to do so.

Back in Mob's subconscious, the evil spirit continues to taunt and attack him, using various tactics to try and break his will and make him give in to his negative emotions. But Mob remains resolute and determined to overcome the evil spirit, even going so far as to confront the traumatic memories that the spirit is using to try and weaken him.

As Mob battles the evil spirit, he begins to realize the true nature of his own power and where it comes from. With this newfound understanding, he is able to summon his full strength and defeat the spirit, freeing himself from his own subconscious mind.

Once he returns to reality, Mob is greeted by his friends and family who are relieved to have him back. Though he is physically unharmed, it is clear that the experience has left a lasting impression on him.

Overall, Inside ~Evil Spirit~ is a thrilling and thought-provoking episode that explores the depths of Mob's psyche and the true nature of his incredible power. With its blend of action, drama, and psychological exploration, it is sure to be a hit with fans of the series.