Yes, The Testament of Sister New Devil is related to High School DxD primarily through fan-created crossover content. While they originate as independent series from different authors, their thematic similarities have led to significant fan-made connections.
Understanding the Relationship: Separate Universes, Shared Crossovers
Originally, High School DxD (written by Ichiei Ishibumi) and The Testament of Sister New Devil (written by Tetsuto Uesu) are distinct light novel series, each with its own unique universe, characters, and storylines. There is no official, canonical crossover between the two series published by their respective creators.
However, due to their shared genres—supernatural action, ecchi, and harem—and similar target audiences, they are popular subjects for fan-made crossovers. These fan works combine elements, characters, and plots from both narratives into a new, unified story.
Key Aspects of High School DxD & The Testament of Sister New Devil Crossovers
The relationship between these two series largely exists within the realm of fanfiction and other derivative works. Here's what typically characterizes these crossovers:
- Nature of Connection: The primary link is through fanfiction, where creators merge the two distinct worlds. These are unofficial stories created by fans, for fans.
- Character Integration: A common theme in these crossovers involves bringing together the protagonists of both series. For instance, Issei Hyodo from High School DxD and Basara Toujou from The Testament of Sister New Devil are often featured together. They are typically depicted as the central heroes of the story, maintaining their roles as "harem kings" from their respective series.
- Story Elements: These fan-created narratives often draw heavily from the canon light novels of both series, attempting to balance their established lore and character developments. To add new dimensions, original characters (OCs), such as an original villain, may also be introduced into the merged storyline.
- Shared Themes: Both series explore themes of supernatural battles, demonic entities, angels, heroes, and the complexities of building a large, diverse group of romantic interests. This thematic overlap makes them highly compatible for crossover scenarios where characters from one world can seamlessly interact with those from another.
Why Crossovers Between These Series?
The appeal of crossing over High School DxD and The Testament of Sister New Devil stems from several factors:
- Genre Alignment: Both are prominent examples of supernatural harem anime/light novels, featuring protagonists who accumulate a growing circle of powerful female allies and romantic interests.
- Parallel Power Systems: While different, both series feature characters with supernatural abilities, making it conceivable for their power systems to interact or merge in a crossover context.
- Protagonist Archetypes: Issei and Basara, despite their differences, share the archetype of a male lead surrounded by powerful, often alluring, female characters, and both are involved in significant supernatural conflicts.
Here's a quick comparison highlighting their distinct yet complementary nature:
| Feature | High School DxD | The Testament of Sister New Devil |
|---|---|---|
| Original Medium | Light Novel | Light Novel |
| Author | Ichiei Ishibumi | Tetsuto Uesu |
| Protagonist | Issei Hyodo (Perverted Devil, Red Dragon Emperor) | Basara Toujou (Former Hero, Contractor with Demons) |
| Main Conflict | Battles between Devils, Angels, Fallen Angels, Gods | Conflicts between Demons, Heroes, and other supernatural factions |
| Core Theme | Supernatural warfare, Harem building, Power ascension | Protecting demon step-sisters, Harem, Past hero conflicts |
In conclusion, while High School DxD and The Testament of Sister New Devil are not officially linked by their original creators, they share a strong relationship within the fan community through various crossover works that blend their exciting supernatural worlds.
