For unknown reasons, he arrives in a parallel world, Japan, and accidentally possesses the body of a pre-high school student who died unexpectedly. Surprisingly, he inherits no memories. His first challenge upon arrival is a language barrier... Just as he struggles to communicate with his family, a heavenly voice arrives, signaling the activation of a high-tech system and the distribution of initial translation tools. This is the story of a man of above-average intelligence and virtually no physical strength, caught in a classroom where strength is paramount.

It's common knowledge that the protagonist is usually described as having a younger sister, a house, and busy parents, but Hoshino Enishi doesn't see it that way. A father he's never met, a selfish and jealous mother, a younger sister who's just starting to care for him, and himself under immense pressure. He doesn't see himself as the protagonist sweating it out in the rosy light of youth; he's just an ordinary passerby in the background. Mediocre—that's how he defines himself. One day, this mediocre boy receives an acceptance letter from an advanced development school. It's a school backed by the government, and he's just an ordinary person, so it's reasonable to accept the offer without resistance, right? As a background character, staying away from the protagonist's main storyline and enjoying his mediocre life is also reasonable, right? As an ordinary person, studying hard, improving himself, and incidentally supporting people he likes is also reasonable, right? "So, can you all stop now? I don't think there's anything to argue about." Sakayanagi Arisu & Ichinose Honami & Karuizawa Megumi & Shiina Hiyori & Ayanokoji Kiyotaka & Kushida Kikyo & **Ai: Damn it!!! Hoshino Yuuki: "..." Did some weirdo get mixed in here? First Year, First Semester: