Ep 13. Proof

Rin Okumura, a teenager who finds out he is the son of Satan and has inherited Satan's powers, has been struggling to control his flames and his urge to use his powers for evil. He and his twin brother, Yukio, attend True Cross Academy, a school for exorcists. Rin's goal is to become an exorcist and defeat Satan, but he faces discrimination from other students who fear his demonic powers.

In episode 13, titled "Proof," Rin is still recovering from his injuries after being stabbed in the heart by Amaimon, one of Satan's demons. He's been assigned to clean the dormitories as a punishment for his reckless behavior during the battle against Amaimon. Meanwhile, the other students are preparing for the upcoming imperial examination, a test that will determine their ranking in the academy. Rin is not allowed to take the exam because of his low grades, but he takes on the challenge to prove himself.

Yukio, Rin's brother and his teacher, notices a change in Rin's behavior and suspects that something is wrong. He confronts Rin and tries to find out what's bothering him. Rin refuses to confide in Yukio, causing a rift between them. Rin feels guilty for causing trouble and putting his friends and brother in danger. He's also struggling with feelings of inadequacy and self-doubt, wondering if he'll ever be able to control his powers and be accepted as an exorcist.

As the day of the imperial examination approaches, Rin decides to change his approach and focus on teamwork, realizing that he can't do everything alone. He enlists the help of his friends, including Shiemi, his classmate and friend who has the power to summon demons, and Ryuji, a hot-headed student who has a grudge against Rin but agrees to help him. Together, they prepare for the exam and practice their abilities.

During the exam, the students face a series of challenges, including exorcising demons and solving puzzles. Rin and his team struggle at first, but they manage to work together and overcome the obstacles. Rin's courage and determination inspire his friends, and they succeed in finishing the exam. However, the results of the test reveal a shocking truth that leaves everyone in shock.

Overall, "Proof" is a powerful episode that delves into Rin's character development and his insecurities, as well as his relationships with his brother and friends. The theme of teamwork and cooperation is also prominent, highlighting the importance of working together towards a common goal. The episode ends on a cliffhanger, setting the stage for the next installment of the series.