Real teaching, but diary flow

As soon as he received the admission letter for Advanced Training, Asakusa Toru got a diary where he could get rewards just by writing in it.
But as he was familiar with diary-related online articles, he saw through the truth in the diary at a glance.
Who would write a diary? Isn't the purpose of writing a diary for others to see?
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 his pen and wrote today's diary.
[Your past, present, and future have all been kidnapped by me. Please be prepared for this.]