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• "Plot" Diary System by CompletionistDiary

  Fandoms: Monster (Anime & Manga), Another Monster: Investigative Report, Original Work  

  • Not Rated
  • Creator Chose Not To Use Archive Warnings
  • F/M
  • Work in Progress

  03 Oct 2025

  Tags

  • Creator Chose Not To Use Archive Warnings
  • Ryu Seiya
  • Eva Heinemann
  • Nina Fortner
  • Lotte Frank
  • Helenka Nováková | Margot Langer
  • Věra Černá (Monster)
  • Carmen (Monster)
  • Nan Sanda
  • Rung Nguyen
  • Elsa Schmitt
  • Johan Liebert
  • Tenma Kenzou
  • Heinrich Lunge
  • System
  • Harems
  • Romance
  • Multiple Relationships
  • hubworld
  • Phoenix Garden
  • Multiple Worlds

  Summary

  Ryu Seiya is a young man who awakens in an unfamiliar room without any memory of his past.
  He receives the "Plot" Diary System, which manifests as a Diary floating in his mind. His task is to alter events in various worlds that are shown to him in the form of stories.

  The only tool to help him accomplish this is the Diary he can write in. Various women included in the original story will receive a copy of his Diary in their own minds, through which they can read along. By carefully deciding what secrets or future developments to reveal in his writing, Ryu can subtly influence the decisions of the women possessing a Diary Copy.

  For each plot point he alters, Ryu receives a reward from the system that is either a skill or attribute of the character whose Fate has been changed. The women with a copy of his Diary receive the same regular rewards as Ryu, therefore incentivizing them to help him in his journey.

  Join Ryu as he navigates sometimes perilous and sometimes perplexing stories, beginning with "Monster" by Naoki Urasawa, where he tries his best to stop Johan Liebert and other murderers from harming the innocent.

  Series

  • Part 1 of "Plot" Diary System

  Language:

  English

  Words:

  100,278

  Chapters:

  26/?

  Comments:

  17

  Kudos:

  10

  Bookmarks:

  5

  Hits:

  238