Worlds

1. The Testament of Sister New Devil

The universe of "The Testament of Sister New Devil" (Japanese: 新妹魔王の契約者, Shinmai Maō no Tesutamento) is a complex and fantastical realm where the story unfolds. Here are some key details about this universe:

Interdimensional Setting: The series takes place across multiple dimensions, including the human world, the demon realm, and the hero clan's domain.

Demon Realm: This is where many demons reside, and it is characterized by various territories ruled by powerful demon lords. The political dynamics within the demon realm play a significant role in the series.

Hero Clan: The hero clan is another significant faction in the universe, with members possessing special powers to combat demons. They often find themselves at odds with the demon realm.

Master-Servant Pact: A recurring element in the series is the master-servant contract, which binds characters in a relationship of power and obedience, often leading to unexpected developments and ecchi situations.

Magical Elements: Magic is a fundamental part of the universe, with characters wielding magical abilities that define their roles and strengths in the ongoing conflicts.

The series explores the tensions and interactions between these different realms and factions, with the main characters often caught in the middle of these conflicts. The universe is rich with lore, providing a backdrop for the personal stories and growth of the characters. 

2. High School Dxd

"High School DxD" is a Japanese light novel series written by Ichiei Ishibumi and illustrated by Miyama-Zero. The series is known for its blend of comedy, supernatural elements, and harem themes. The story is set in a world where various mythological beings exist, including angels, fallen angels, and devils1.

The main setting of "High School DxD" is Kuoh Academy, which appears to be an ordinary school but holds a secret. It was formerly an all-girls school that has recently become co-educational. Unknown to normal humans, the student population includes angels, fallen angels, and devils.

The series explores the complex interactions between these different factions. The world of "High School DxD" is rich with magical battles, political intrigue, The fictional universe of "High School DxD" also expands into the "Underworld," which is the home of the devils and fallen angels, adding another layer to the already intricate world.

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