LadyPasta

Yukiteru Amano (or Yuki) is a loner who never really interact with people and prefers writing a diary on his cell phone with his only companion being an imaginary friend named Deus Ex Machina, the God of Time and Space. However, Yuki soon learns that Deus is not a figment of his imagination but real when Deus makes him a participant in a battle royale with eleven others.

In 1972, 26 years ago, a very popular honor student named Misaki died partway through the school year in Yomiyama North Middle School’s class 3-3. The rest of the students, devastated by the unexpected loss, decided to carry on as if their classmate were still alive, going so far as to keep the desk in place and bringing it to the graduation ceremony.