Ep 1. A Full-frontal Hero Arises in the World!

In episode 1 of Heaven's Lost Property season 1, "A Full-frontal Hero Arises in the World!", the viewer is introduced to Tomoki Sakurai, a carefree high school student who dreams of living a peaceful life without any disturbances. However, his dreams are shattered when he is awakened by a strange dream about an angel-like being falling from the sky.

Tomoki brushes off the dream as a product of his active imagination but soon realizes it was not just a dream when he encounters an actual angel, named Ikaros, with magical powers the next day. Ikaros is seeking the one who summoned her and makes Tomoki her master in the process.

Tomoki is taken aback by Ikaros and her abilities; she can grant any wish from her master, but it comes at a cost, and she must follow his every command. Tomoki soon learns that he is not the only one who has a powerful girl at his command. A trio of girls, known as the "New World Discovery Club," is after his angel to utilize her power for their own gain.

The episode sees Tomoki and Ikaros navigate their newfound relationship as they flee from the clutches of the club. Along with that, Angeloids, a race of beings, are introduced as well as their masters, the "Synapse." The Angeloids have powers that surpass human knowledge and possess abilities beyond anyone's comprehension.

As the episode progresses, Tomoki learns more about Ikaros and the secrets surrounding her, such as how she is connected with the Angeloids, and he must protect her and himself from the dangers that follow. The episode ends with Tomoki and Ikaros' bond growing stronger as they plan to face their enemies together.

Overall, "A Full-frontal Hero Arises in the World!" is an action-packed, sci-fi anime episode that establishes the plot, introduces a set of intriguing characters and sets the tone for what's to come in the series. The episode's pacing sets it apart from other anime series as it wastes no time in introducing its key players and delves deep into their stories, setting the scene for an exciting and thrilling ride.