: The protagonist isn't the one who forgets; instead, the entire world is "overwritten," and he is the only one who remembers the original history where humans won a great war. Conclusion
: A group of teenagers wakes up in a world with no memories and must struggle simply to survive, focusing on the harsh reality of being a novice adventurer. : The protagonist isn't the one who forgets;
The "memory loss" trope is frequently used to allow viewers to learn about a world's rules alongside the protagonist. Other series explore this differently: the entire world is "overwritten
The narrative hook—waking up in a strange place with no memory—serves as a powerful blank slate for both the character and the audience. In Black Summoner , Kelvin discovers that he didn't just lose his memories accidentally; he actively bartered them away during his transmigration to a fantasy realm. This choice defines his journey: : The protagonist isn't the one who forgets;
: Kelvin trades his past existence for the rare class of "Summoner".