In Class 1-A of Tokyo Advanced Nurturing High School, there was a student who became the talk of the school from the very first day. He was effortlessly cool, even doing his cleaning duties, eating lunch, and standing as punishment in the hallway. Every move he made exuded—Cool! Cooler! Coolest! This student, who embodied coolness and elegance to the extreme, was named—Sakamoto. He casually pushed up his glasses: "I am Sakamoto. What brings you here?"

As soon as he received the admission letter for Advanced Training, Asakusa Toru got a diary that he could get rewards by just writing in it.

But as a person familiar with diary-related online articles, he saw through the truth of the diary at a glance.

Who would write a diary? Isn't the purpose of writing a diary to let others see it?

According to the diary, the reward drawn after completing the diary actually depends on: how interesting the content is, whether the spoilers are appropriate, and the reader's emotional fluctuations.

So, he picked up the pen and wrote today's diary.

[Your past, present, and future have all been kidnapped by me, please be prepared. ]

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.