Ep 19. An Ordinary Day

Rin wakes up to the sound of a phone ringing. Shura answers it and relays a message from Yukio that they have a day off. Rin is thrilled and plans to spend the day with Shiemi, who he has developed strong feelings for. Meanwhile, Mephisto Pheles meets with Shura and reveals the truth about Rin's birth and his connection to Satan.

Rin and Shiemi spend their day off exploring the city. They visit a park and Rin spots a man with the same tattoo on his neck as him. He tries to follow the man but loses him in the crowd. They then go to a café where they meet a friendly waitress who gives Rin a charm for good luck.

As they walk around, Rin notices that people are starting to act strangely. They all seem to be in a trance and are moving towards a specific location. Rin and Shiemi follow the crowd and end up at a large building where they discover that a demon is possessing the people and forcing them to do its bidding. Rin and Shiemi try to fight the demon but are quickly overwhelmed.

Meanwhile, Yukio receives a call from Mephisto Pheles informing him of the situation. He rushes to the scene and teams up with Rin and Shiemi to defeat the demon. The demon is a powerful one and they struggle to find a way to defeat it.

Mephisto Pheles appears and reveals that the demon is being controlled by a powerful exorcist who seeks to use its power for his own gain. Mephisto and Yukio team up to take down the exorcist while Rin and Shiemi continue to fight the demon.

As the battle rages on, Rin taps into his demonic powers to fight back. He manages to weaken the demon enough for Yukio to land the final blow. The exorcist is defeated and the possessed people are freed from the demon's control.

After the battle, Rin reflects on the fact that he is a son of Satan and wonders if he will ever be accepted by society. Yukio assures him that he is not alone and that he will always be there for him. Rin feels grateful for the support of his brother and friends.

The episode ends with Rin and Shiemi sitting on a hill watching the sunset. Rin gives Shiemi the charm he received from the waitress as a token of his affection. They hold hands and enjoy the peaceful moment together.