A random little boy in a laboratory being an experiment for as long as we can remember. At first, that wasn't allowed! He knew. Still, he continued writing in his old diary for years.

His room is shared with everyone, after all. Afternoon, he was subjected to some experiments, as usual. After that, he runs to secretly write in his diary.

September 18, 2058.

Dear diary, today someone else disappeared. My leg hurts... Anyway, that's it for today! With affection, Muichiro.